Teton County, Wyoming, Grand Teton National Park Area

Survey Area WY666• Wyoming

The dominant drainage class is Well drained and the dominant hydrologic group is A (high infiltration, low runoff). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Teton County, Wyoming, Grand Teton National Park Area. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map Unit	Acres	Drainage	Hydro Group	Dwellings	Septic
Taglake-Sebud association *	41K	Well drained	A	Very limited	Very limited
Water	34K			Not rated	Not rated
Rock outcrop-Teewinot-Moran association *	27K		D	Not rated	Not rated
Tineman gravelly loam	26K	Well drained	B	Not limited	Very limited
Leighcan-Rock outcrop-Walcott association *	20K	Well drained	A	Very limited	Very limited
Tineman-Bearmouth gravelly loams, 0 to 3 percent slopes	19K	Well drained	B	Not limited	Very limited
Tetonville-Wilsonville fine sandy loams	16K	Somewhat poorly drained	B	Very limited	Very limited
Cryaquolls-Cryofibrists complex *	14K	Poorly drained	B/D	Very limited	Very limited
Rubble land-Midfork-Starman association *	13K		A	Not rated	Not rated
Rock outcrop *	11K		D	Not rated	Not rated
Starman-Owlcan association *	11K	Well drained	D	Very limited	Very limited
Leighcan-Moran-Walcott association *	10K	Well drained	A	Somewhat limited	Very limited
Rubble land-Walcott-Leighcan association *	10K	Well drained	A	Not rated	Not rated
Taglake-Sebud association, steep *	9K	Well drained	A	Very limited	Very limited
Rubble land *	8K		A	Not rated	Not rated
Uhl-Roxal association *	8K	Well drained	B	Very limited	Very limited
Tetonville gravelly loam	8K	Somewhat poorly drained	C	Very limited	Very limited
Tetonville-Riverwash complex	7K	Somewhat poorly drained		Not rated	Not rated
Greyback gravelly loam, 0 to 3 percent slopes	7K	Somewhat excessively drained	B	Not limited	Very limited
Tineman-Bearmouth gravelly loams, 3 to 40 percent slopes *	6K	Well drained	B	Not limited	Very limited

Soil Orders in This Area

The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.

Mollisols

Fertile grassland soils with thick, dark topsoil. Among the best for agriculture, building, and gardening.

Alfisols

Moderately weathered forest soils with clay-enriched subsoil. Productive for agriculture, generally good for building and septic.

Entisols

Young soils with little development — found on floodplains, dunes, and steep slopes. Properties vary widely by setting.

What This Means

Building & Foundations

About 41% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.

Septic Systems

About 63% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.

Gardening & Agriculture

Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.