Natural Resources
Conservation Service
Major Land Resource Area 038X
Major Land Resource Area
Accessed: 04/21/2026
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Next, learn more about the selected ecological site group and its characteristic dynamics by browsing the ecological site group description and exploring alternative state and transition model formats.
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-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
-
i
Key Characteristics
- Site located south of the Columbia River.
- . Located within Crater Lake National Park Refer to LRU F (or 6) Key (Mazama Cascades).
- Site located within Crater Lake National Park
- Located below timberline
- Otherwise; forested communities typical
- Otherwise
- Mid-elevation sites; natural fire regime is mixed-severity; Shasta red fir forest typical
- Lowest elevations; soil is medial, not ashy; Douglas-fir important Pseudotsuga menziesii/Vaccinium membranaceum/Chimaphila umbellata (F003XY709OR)
Briefcase
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Ecological site groups
Major Land Resource Areas
Ecological site group photos
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Interactive key
Additional water
Uplands
[Criteria]
038XESG09 – Riparian
038XESG09 – Riparian
Ephemeral water
Sand >50% & Clay <25% for surface and subsurface
038XESG13 – Sandy Bottoms
038XESG13 – Sandy Bottoms
Sand <50% & Clay >25% for surface and subsurface
038XESG01 – Bottoms
038XESG01 – Bottoms
>75% bedrock outcrop
038XESG08 – Outcrops
038XESG08 – Outcrops
<75% bedrock outcrop
Surface SAR >8, or Subsurface EC>8, or Surface EC >4
038XESG11 – Saline Hills
038XESG11 – Saline Hills
Surface SAR<8, or Subsurface EC <8, and Surface EC <4
Gypsum >5% surface or >10% subsurface
038XESG06 – Gypsum
038XESG06 – Gypsum
Gypsum <5% surface and <10% subsurface
EC >1.5 surface or >2 subsurface
038XESG12 – Saline Uplands
038XESG12 – Saline Uplands
EC <1.5 surface and <2 subsurface
slope >35% & >40% surface rock
038XESG02 – Breaks
038XESG02 – Breaks
slope <35% or <40% surface rock
depth <30cm
038XESG16 – Very Shallow
038XESG16 – Very Shallow
depth: 30-55cm
038XESG15 – Shallow
038XESG15 – Shallow
depth >55cm
rock >30% surface or >30% subsurface
038XESG04 – Deep Rocky
038XESG04 – Deep Rocky
rock <30% surface and <30% subsurface
clay >30% surface or >35% subsurface
038XESG03 – Clay Uplands
038XESG03 – Clay Uplands
clay <30% surface or <35% subsurface
sand >75% or texture is Loamy Sand or sandier in surface & subsurface
038XESG14 – Sandy Uplands
038XESG14 – Sandy Uplands
sand <75% or texture is Loamy Fine Sand or finer in surface & subsurface
clay <20% or texture is Sandy Loam or sandier in surface
038XESG07 – Loamy Uplands
038XESG07 – Loamy Uplands
clay >20% or texture is Fine Sandy Loam or finer in surface
038XESG05 – Finer Uplands
038XESG05 – Finer Uplands
Additional water
Uplands
Perennial water - 041XESG09 Riparian
Ephemeral water
Sand >50% & clay <25% for surface and subsurface - 040XESG13 Sandy Bottoms
Sand <50% or clay >25% for surface and subsurface - 040XESG01 Bottoms
Surface SAR >8 - 042BESG38 Madrean Woodland Saline Hills
Surface SAR <8
Gypsum >5% surface or >10% subsurface - 042AESG33 Gypsum Thornscrub
Gypsum <5% surface and <10% subsurface
Subsurface EC >8 or surface EC >4 - 042BESGMadrean Woodland Saline Hills
Subsurface EC <8 and surface EC <4
EC >1.5 surface or >2 subsurface - 041XESG39 Thornscrub Saline Uplands
EC <1.5 surface and <2 subsurface
Slope >35% & >40% surface rock
Slope <35% or <40% surface rock
Elevation 2500-3700 ft - 040XESG Thornscrub Breaks
Elevation 3700-4500 ft
038XESG18 – Semi-Desert Grassland Breaks
038XESG18 – Semi-Desert Grassland Breaks
Elevation 4500-6000 ft
038XESG19 – Madrean Woodland Breaks
038XESG19 – Madrean Woodland Breaks
Elevation >6000 ft - 042CESG20 Temperate Forest Breaks
Depth <30cm
Depth: 30-55cm
Depth >55cm
Elevation 2500-3700 ft - 040XESG46 Very Shallow Thornscrub
Elevation 3700-4500 ft - 042AESG47 Very Shallow Semi-Desert Grassland
Elevation 4500-6000 ft - 042AESG48 Very Shallow Madrean Woodland
Elevation >6000 ft - 070BESG49 Very Shallow Temperate Forest
Elevation 2500-3700 ft - 040XESG42 Shallow Thornscrub
Elevation 3700-4500 ft - 042AESG43 Shallow Semi-Desert Grassland
Elevation 4500-6000 ft
038XESG44 – Shallow Madrean Woodland
038XESG44 – Shallow Madrean Woodland
Elevation >6000 ft - 070BESG45 Shallow Temperate Forest
Rock >30% surface or >30% subsurface
Rock <30% surface and <30% subsurface
Elevation 2500-3700 ft - 040XESG25 Deep Rocky Thornscrub
Elevation 3700-4500 ft - 042AESG26 Deep Rocky Semi-Desert Grassland
Elevation 4500-6000 ft - 042BESG Deep Rocky Madrean Woodland
Elevation >6000 ft - 070BESG28 Deep Rocky Temperate Forest
Clay >30% surface or >35% subsurface
Clay <30% surface and <35% subsurface
Elevation 2500-3700 ft - 040XESG21 Thornscrub Clay Uplands
Elevation 3700-4500 ft - 041XESG22 Semi-Desert Grasslands Clay Uplands
Elevation 4500-6000 ft
038XESG23 – Madrean Woodland Clay Uplands
038XESG23 – Madrean Woodland Clay Uplands
Elevation >6000 ft
038XESG24 – Temperate Forest Clay Uplands
038XESG24 – Temperate Forest Clay Uplands
Sand >75% or texture is loamy sand or sandier in surface & subsurface
Sand <75% or texture sandy loam or finer in surface & subsurface
elevation2500-3700 ft - 042CESG40 Thornscrub Sandy Uplands
Elevation 3700-4500 ft - 042BESG41 Semi-Desert Grasslands Sandy Uplands
Clay <20% or texture is sandy loam or sandier in surface
Clay >20% or texture is finer than sandy loam in surface
Elevation 2500-3700 ft - 040XESG34 Thornscrub Loamy Uplands
Elevation 3700-4500 ft - 041XESG35 Semi-Desert Grassland Loamy Uplands
Elevation 4500-6000 ft - 042BESG36 Madrean Woodland Loamy Uplands
Elevation >6000 ft - 070BESG37 Temperate Forest Loamy Uplands
Elevation 2500-3700 ft - 042AESG29 Thornscrub Finer Uplands
Elevation 3700-4500 ft - 041XESG30 Semi-Desert Grassland Finer Uplands
Elevation 4500-6000 ft - 070BESG31 Madrean Woodland Finer Uplands
Elevation >6000 ft - 070BESG32 Temperate Forest Finer Uplands
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Ecological site group keys
MLRA 38
I.
Additional water
B.
Ephemeral water
II.
Uplands
B.
<75% bedrock outcrop
2
Surface SAR<8, or Subsurface EC <8, and Surface EC <4
ii.
Gypsum <5% surface and <10% subsurface
b.
EC <1.5 surface and <2 subsurface
2)
slope <35% or <40% surface rock
c)
depth >55cm
(2)
rock <30% surface and <30% subsurface
(b)
clay <30% surface or <35% subsurface
(1)
sand >75% or texture is Loamy Sand or sandier in surface & subsurface
... 038XESG14 – Sandy Uplands
(2)
sand <75% or texture is Loamy Fine Sand or finer in surface & subsurface
National Park Service
I.
Additional water
A.
Perennial water - 041XESG09 Riparian
B.
Ephemeral water
1
Sand >50% & clay <25% for surface and subsurface - 040XESG13 Sandy Bottoms
2
Sand <50% or clay >25% for surface and subsurface - 040XESG01 Bottoms
II.
Uplands
A.
Surface SAR >8 - 042BESG38 Madrean Woodland Saline Hills
B.
Surface SAR <8
1
Gypsum >5% surface or >10% subsurface - 042AESG33 Gypsum Thornscrub
2
Gypsum <5% surface and <10% subsurface
i.
Subsurface EC >8 or surface EC >4 - 042BESGMadrean Woodland Saline Hills
ii.
Subsurface EC <8 and surface EC <4
a.
EC >1.5 surface or >2 subsurface - 041XESG39 Thornscrub Saline Uplands
b.
EC <1.5 surface and <2 subsurface
1)
Slope >35% & >40% surface rock
a)
Elevation 2500-3700 ft - 040XESG Thornscrub Breaks
d)
Elevation >6000 ft - 042CESG20 Temperate Forest Breaks
2)
Slope <35% or <40% surface rock
a)
Depth <30cm
(1)
Elevation 2500-3700 ft - 040XESG46 Very Shallow Thornscrub
(2)
Elevation 3700-4500 ft - 042AESG47 Very Shallow Semi-Desert Grassland
(3)
Elevation 4500-6000 ft - 042AESG48 Very Shallow Madrean Woodland
(4)
Elevation >6000 ft - 070BESG49 Very Shallow Temperate Forest
b)
Depth: 30-55cm
(1)
Elevation 2500-3700 ft - 040XESG42 Shallow Thornscrub
(2)
Elevation 3700-4500 ft - 042AESG43 Shallow Semi-Desert Grassland
(4)
Elevation >6000 ft - 070BESG45 Shallow Temperate Forest
c)
Depth >55cm
(1)
Rock >30% surface or >30% subsurface
(a)
Elevation 2500-3700 ft - 040XESG25 Deep Rocky Thornscrub
(b)
Elevation 3700-4500 ft - 042AESG26 Deep Rocky Semi-Desert Grassland
(c)
Elevation 4500-6000 ft - 042BESG Deep Rocky Madrean Woodland
(d)
Elevation >6000 ft - 070BESG28 Deep Rocky Temperate Forest
(2)
Rock <30% surface and <30% subsurface
(a)
Clay >30% surface or >35% subsurface
(1)
Elevation 2500-3700 ft - 040XESG21 Thornscrub Clay Uplands
(2)
Elevation 3700-4500 ft - 041XESG22 Semi-Desert Grasslands Clay Uplands
(b)
Clay <30% surface and <35% subsurface
(1)
Sand >75% or texture is loamy sand or sandier in surface & subsurface
(a)
elevation2500-3700 ft - 042CESG40 Thornscrub Sandy Uplands
(b)
Elevation 3700-4500 ft - 042BESG41 Semi-Desert Grasslands Sandy Uplands
(2)
Sand <75% or texture sandy loam or finer in surface & subsurface
(a)
Clay <20% or texture is sandy loam or sandier in surface
(1)
Elevation 2500-3700 ft - 040XESG34 Thornscrub Loamy Uplands
(2)
Elevation 3700-4500 ft - 041XESG35 Semi-Desert Grassland Loamy Uplands
(3)
Elevation 4500-6000 ft - 042BESG36 Madrean Woodland Loamy Uplands
(4)
Elevation >6000 ft - 070BESG37 Temperate Forest Loamy Uplands
(b)
Clay >20% or texture is finer than sandy loam in surface
(1)
Elevation 2500-3700 ft - 042AESG29 Thornscrub Finer Uplands
(2)
Elevation 3700-4500 ft - 041XESG30 Semi-Desert Grassland Finer Uplands
(3)
Elevation 4500-6000 ft - 070BESG31 Madrean Woodland Finer Uplands
(4)
Elevation >6000 ft - 070BESG32 Temperate Forest Finer Uplands
The Ecosystem Dynamics Interpretive Tool is an information system framework developed by the USDA-ARS Jornada Experimental Range, USDA Natural Resources Conservation Service, and New Mexico State University.
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