Natural Resources
Conservation Service
Major Land Resource Area 034B
Major Land Resource Area
Accessed: 04/19/2026
Previous
Sections
Next
Next steps
-
1
Select an ecological site group
Select an ecological site group using the list, keys, photos, briefcase, or quick search option located on this page. -
2
Explore the ecological site group description
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.
Ecological site group list
Tools
Search
Filter by
interactive key
clear all
Sort by
id
name
stage
Viewing 20 of 24
View all
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
-
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
- . South-facing slopes; droughty in summer High Cascades Dry (F003XY705OR)
Briefcase
Add ecological site groups and Major Land Resource Areas to your briefcase by clicking on the briefcase (
) icon wherever it occurs. Drag and drop items to reorder. Cookies are used to store briefcase items between browsing sessions. Because of this, the number of items that can be added to your briefcase is limited, and briefcase items added on one device and browser cannot be accessed from another device or browser. Users who do not wish to place cookies on their devices should not use the briefcase tool. Briefcase cookies serve no other purpose than described here and are deleted whenever browsing history is cleared.
Ecological site groups
Major Land Resource Areas
Ecological site group photos
Tools
Filter by
interactive key
clear all
Type
Image size
Done
Filters
Interactive key
>75% bedrock ourcrop
034BESG07 – Outcrops
034BESG07 – Outcrops
<75% bedrock outcrop
Perennial water
034BESG08 – Riparian
034BESG08 – Riparian
Ephemeral water or uplands
Aridic moisture regime
Ustic moisture regime
Ephemeral water
Uplands
Subsurface EC >4
034BESG22 – Arid Cool Saline Bottoms
034BESG22 – Arid Cool Saline Bottoms
Subsurface EC <4
034BESG25 – Arid Cool Sandy Bottoms
034BESG25 – Arid Cool Sandy Bottoms
Surface SAR >8
034BESG23 – Arid Cool Saline Hills
034BESG23 – Arid Cool Saline Hills
Surface SAR <8
Gypsum >5% surface or >10% subsurface
034BESG20 – Arid Cool Gypsum
034BESG20 – Arid Cool Gypsum
Gypsum <5% surface and <10% subsurface
Subsurface EC >8 or subsurface EC >4
034BESG23 – Arid Cool Saline Hills
034BESG23 – Arid Cool Saline Hills
Subsurface EC <8 and surface EC <4
EC >1.5 surface or >2 subsurface
034BESG24 – Arid Cool Saline Uplands
034BESG24 – Arid Cool Saline Uplands
EC <1.5 surface and <2 subsurface
Slope >35% & >40% surface rock
034BESG16 – Arid Cool Breaks
034BESG16 – Arid Cool Breaks
Slope <35% or <40% surface rock
Depth <30cm
034BESG28 – Arid Cool Very Shallow
034BESG28 – Arid Cool Very Shallow
Depth: 30-55cm
034BESG27 – Arid Cool Shallow
034BESG27 – Arid Cool Shallow
Depth >55cm
Rock >30% surface or >30% subsurface
034BESG18 – Arid Cool Deep Rocky
034BESG18 – Arid Cool Deep Rocky
Rock <30% surface and <30% subsurface
Clay >30% surface or >35% subsurface
034BESG17 – Arid Cool Clay Uplands
034BESG17 – Arid Cool Clay Uplands
Clay <30% surface and <35% subsurface
Sand >75% or texture is loamy sand or sandier in surface & subsurface
034BESG26 – Arid Cool Sandy Uplands
034BESG26 – Arid Cool Sandy Uplands
Sand <75% or texture is sandy loam or finer in surface & subsurface
Clay <20% or texture is sandy loam or sandier in surface
034BESG21 – Arid Cool Loamy Uplands
034BESG21 – Arid Cool Loamy Uplands
Clay >20% or texture is finer than sandy loam in surface
034BESG19 – Arid Cool Finer Uplands
034BESG19 – Arid Cool Finer Uplands
Ephemeral water
034BESG35 – Semiarid Cool Sandy Bottoms
034BESG35 – Semiarid Cool Sandy Bottoms
Uplands
Surface SAR >8
034BESG33 – Semiarid Cool Saline Hills
034BESG33 – Semiarid Cool Saline Hills
Surface SAR <8
Gypsum >5% surface or >10% subsurface
034BESG32 – Semiarid Cool Gypsum
034BESG32 – Semiarid Cool Gypsum
Gypsum <5% surface and <10% subsurface
Subsurface EC>8 or surface EC>4
034BESG33 – Semiarid Cool Saline Hills
034BESG33 – Semiarid Cool Saline Hills
Subsurface EC<8 and surface EC<4
EC >1.5 surface or >2 subsurface
034BESG34 – Semiarid Cool Saline Uplands, Sandy Uplands, Loamy Uplands, & Finer Uplands
034BESG34 – Semiarid Cool Saline Uplands, Sandy Uplands, Loamy Uplands, & Finer Uplands
EC <1.5 surface and <2 subsurface
Slope >35% & >40% surface rock
034BESG29 – Semiarid Cool Breaks
034BESG29 – Semiarid Cool Breaks
Slope <35% or <40% surface rock
Depth <30cm
034BESG37 – Semiarid Cool Very Shallow
034BESG37 – Semiarid Cool Very Shallow
Depth: 30-55cm
034BESG36 – Semiarid Cool Shallow
034BESG36 – Semiarid Cool Shallow
Depth >55cm
Rock >30% surface or >30% subsurface
034BESG31 – Semiarid Cool Deep Rocky
034BESG31 – Semiarid Cool Deep Rocky
Rock <30% surface and <30% subsurface
Clay >30% surface or >35% subsurface
034BESG30 – Semiarid Cool Clay Uplands
034BESG30 – Semiarid Cool Clay Uplands
Clay <30% surface and <35% subsurface
034BESG34 – Semiarid Cool Saline Uplands, Sandy Uplands, Loamy Uplands, & Finer Uplands
034BESG34 – Semiarid Cool Saline Uplands, Sandy Uplands, Loamy Uplands, & Finer Uplands
Print Options
Sections
Font
A
A
A
A
Other
Print
Ecological site group keys
MLRA 34B
II.
<75% bedrock outcrop
B.
Ephemeral water or uplands
1
Aridic moisture regime
i.
Ephemeral water
ii.
Uplands
b.
Surface SAR <8
2)
Gypsum <5% surface and <10% subsurface
b)
Subsurface EC <8 and surface EC <4
(2)
EC <1.5 surface and <2 subsurface
(b)
Slope <35% or <40% surface rock
(3)
Depth >55cm
(b)
Rock <30% surface and <30% subsurface
(2)
Clay <30% surface and <35% subsurface
(a)
Sand >75% or texture is loamy sand or sandier in surface & subsurface
... 034BESG26 – Arid Cool Sandy Uplands
(b)
Sand <75% or texture is sandy loam or finer in surface & subsurface
(1)
Clay <20% or texture is sandy loam or sandier in surface
... 034BESG21 – Arid Cool Loamy Uplands
(2)
Clay >20% or texture is finer than sandy loam in surface
... 034BESG19 – Arid Cool Finer Uplands
2
Ustic moisture regime
ii.
Uplands
b.
Surface SAR <8
2)
Gypsum <5% surface and <10% subsurface
b)
Subsurface EC<8 and surface EC<4
(1)
EC >1.5 surface or >2 subsurface
... 034BESG34 – Semiarid Cool Saline Uplands, Sandy Uplands, Loamy Uplands, & Finer Uplands
(2)
EC <1.5 surface and <2 subsurface
(b)
Slope <35% or <40% surface rock
(3)
Depth >55cm
(b)
Rock <30% surface and <30% subsurface
(2)
Clay <30% surface and <35% subsurface
... 034BESG34 – Semiarid Cool Saline Uplands, Sandy Uplands, Loamy Uplands, & 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.
Accessibility statement