Natural Resources
Conservation Service
Major Land Resource Area 030X
Major Land Resource Area
Accessed: 04/24/2026
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Select an ecological site group using the list, keys, photos, briefcase, or quick search option located on this page. -
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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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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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
-
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
- High-elevation sites; natural fire regime is stand-replacing, estimated fire return interval >200 years; mountain hemlock forest typical
- . North-facing slopes High Cascades Wet (F003XY701OR)
Briefcase
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Ecological site groups
Major Land Resource Areas
Ecological site group photos
Tools
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interactive key
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Filters
Interactive key
Additional water
Uplands
Perennial water
030XESG08 – Riparian
030XESG08 – Riparian
Ephemeral water
Subsurface EC>4
030XESG09 – Saline Bottoms
030XESG09 – Saline Bottoms
Subsurface <4
030XESG12 – Sandy Bottoms
030XESG12 – Sandy Bottoms
>75% bedrock outcrop
030XESG07 – Outcrops
030XESG07 – Outcrops
<75% bedrock outcrop
Surface SAR > 8, or Subsurface EC > 8, or Surface EC > 4
030XESG10 – Saline Hills
030XESG10 – Saline Hills
Surface SAR <8, and Subsurface EC <8, and Surface EC <4
Gypsum >5% surface or >10% subsurface
030XESG05 – Gypsum
030XESG05 – Gypsum
Gypsum <5% surface and <10% subsurface
EC >1.5 surface or >2 subsurface
030XESG11 – Saline Uplands
030XESG11 – Saline Uplands
EC <1.5 surface and <2 subsurface
slope >35% and >40% surface rock
030XESG01 – Breaks
030XESG01 – Breaks
slope <35% or <40% surface rock
Depth <30cm
030XESG15 – Very Shallow
030XESG15 – Very Shallow
Depth: 30-55 cm
030XESG14 – Shallow
030XESG14 – Shallow
Depth >55cm
Rock >30% surface or >30% subsurface
030XESG03 – Deep Rocky
030XESG03 – Deep Rocky
Rock <30% surface and <30% subsurface
Clay >30% surface or >35 % subsurface
030XESG02 – Clay Uplands
030XESG02 – Clay Uplands
Clay <30% surface and <35% subsurface
sand >75%, or texture is Loamy Sand or sandier in surface & subsurface
030XESG13 – Sandy Uplands
030XESG13 – Sandy Uplands
sand <75% and texture is sandy loam or finer in surface & subsurface
Clay <20% or texture is Sandy Loam or sandier in surface
030XESG06 – Loamy Uplands
030XESG06 – Loamy Uplands
Clay >20% and texture is SCL, L, SIL or finer in surface
030XESG04 – Finer Uplands
030XESG04 – Finer Uplands
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Ecological site group keys
MLRA 30
I.
Additional water
B.
Ephemeral water
II.
Uplands
B.
<75% bedrock outcrop
2
Surface SAR <8, and 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 and <35% subsurface
(1)
sand >75%, or texture is Loamy Sand or sandier in surface & subsurface
... 030XESG13 – Sandy Uplands
(2)
sand <75% and texture is sandy loam or finer in surface & subsurface
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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