Frostline.info

Frost line depth in Colorado

Estimated frost depth in typical soil runs from 21″ to 57″ across Colorado's 64 counties. Pick your county or enter a ZIP code for a local estimate.

Deepest frost

  1. Mineral County 57″
  2. Gunnison County 53″
  3. Hinsdale County 49″
  4. Jackson County 49″
  5. Grand County 48″

Mildest

  1. Baca County 21″
  2. Broomfield County 24″
  3. Jefferson County 24″
  4. Las Animas County 25″
  5. Gilpin County 25″

Frost depth by county

CountyEst. frost (typical soil)Typical code range
Adams County26″24–36″
Alamosa County47″42–60″
Arapahoe County27″24–36″
Archuleta County40″36–48″
Baca County21″18–30″
Bent County27″24–36″
Boulder County28″24–36″
Broomfield County24″24–30″
Chaffee County38″30–48″
Cheyenne County27″24–36″
Clear Creek County37″30–48″
Conejos County46″36–60″
Costilla County42″36–54″
Crowley County27″24–36″
Custer County36″30–48″
Delta County32″30–42″
Denver County25″24–36″
Dolores County36″30–48″
Douglas County27″24–36″
Eagle County45″36–54″
El Paso County28″24–36″
Elbert County30″24–36″
Fremont County28″24–36″
Garfield County37″30–48″
Gilpin County25″24–36″
Grand County48″42–60″
Gunnison County53″42–66″
Hinsdale County49″42–60″
Huerfano County28″24–36″
Jackson County49″42–60″
Jefferson County24″24–30″
Kiowa County27″24–36″
Kit Carson County28″24–36″
La Plata County34″30–42″
Lake County43″36–54″
Larimer County31″24–42″
Las Animas County25″24–36″
Lincoln County29″24–36″
Logan County34″30–42″
Mesa County33″30–42″
Mineral County57″48–72″
Moffat County47″42–60″
Montezuma County30″24–42″
Montrose County34″30–42″
Morgan County34″30–42″
Otero County27″24–36″
Ouray County36″30–48″
Park County35″30–42″
Phillips County31″24–42″
Pitkin County42″36–54″
Prowers County28″24–36″
Pueblo County29″24–36″
Rio Blanco County45″36–54″
Rio Grande County44″36–54″
Routt County46″36–60″
Saguache County46″36–60″
San Juan County48″42–60″
San Miguel County37″30–48″
Sedgwick County33″30–42″
Summit County47″42–60″
Teller County30″24–42″
Washington County32″30–42″
Weld County32″30–42″
Yuma County29″24–36″

Common questions

What is the frost line depth in Colorado?

It ranges from about 21 inches in the mildest county to 57 inches in the coldest, in typical soil.

Which Colorado county has the deepest frost?

Mineral County, at about 57 inches in typical soil.