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Colorado landslide risk

64 counties scored 0 rated Very High

Mesa County has the highest landslide risk in Colorado, scoring 99.4 out of 100 — rated "Relatively High" by FEMA's National Risk Index. Recorded landslide events across Colorado have increased 220% over the past five years compared to the prior five-year period.

# County NRI score Rating NOAA events
2016–2026
1 Mesa County 99.4 Relatively High 15
2 Garfield County 99.1 Relatively High 30
3 Ouray County 98.3 Relatively High 15
4 Pitkin County 98.3 Relatively High 25
5 Dolores County 97.9 Relatively High 0
6 Jefferson County 97.6 Relatively Moderate 0
7 Chaffee County 97.5 Relatively Moderate 1
8 Gunnison County 97.4 Relatively Moderate 12
9 Larimer County 97.2 Relatively Moderate 0
10 Saguache County 96.2 Relatively Moderate 1
11 Eagle County 95.6 Relatively Moderate 10
12 Lake County 94.7 Relatively Moderate 0
13 Park County 94.6 Relatively Moderate 0
14 Delta County 94.5 Relatively Moderate 1
15 Rio Blanco County 93.9 Relatively Moderate 23
16 Fremont County 93.6 Relatively Moderate 0
17 Summit County 93.6 Relatively Moderate 0
18 Grand County 93.5 Relatively Moderate 0
19 Montezuma County 93.3 Relatively Moderate 4
20 Rio Grande County 93.2 Relatively Moderate 0
21 Moffat County 92.3 Relatively Moderate 1
22 Teller County 92.2 Relatively Moderate 0
23 Archuleta County 90.9 Relatively Moderate 6
24 Boulder County 89.9 Relatively Moderate 0
25 Routt County 89.9 Relatively Moderate 2
26 Clear Creek County 88.1 Relatively Moderate 0
27 La Plata County 87.8 Relatively Moderate 13
28 Denver County 87.3 Relatively Moderate 0
29 San Miguel County 86.3 Relatively Low 31
30 Gilpin County 85.2 Relatively Low 0
31 Montrose County 82.2 Relatively Low 6
32 Hinsdale County 81.9 Relatively Low 3
33 Custer County 81.7 Relatively Low 1
34 Costilla County 78.5 Relatively Low 0
35 Douglas County 78.2 Relatively Low 0
36 Mineral County 78.1 Relatively Low 1
37 Las Animas County 70.3 Relatively Low 0
38 Conejos County 68 Relatively Low 1
39 Jackson County 67.5 Relatively Low 0
40 San Juan County 64.3 Relatively Low 8
41 Arapahoe County 50.5 Very Low 0
42 Pueblo County 48.6 Very Low 0
43 El Paso County 42.8 Very Low 1
44 Huerfano County 41.4 Very Low 3
45 Weld County 41.2 Very Low 0
46 Adams County 38.4 Very Low 0
47 Alamosa County 38.1 Very Low 0
48 Elbert County 32.1 Very Low 0
49 Yuma County 22.8 Very Low 0
50 Logan County 13.5 Very Low 0
51 Morgan County 9.5 Very Low 0
52 Otero County 9.2 Very Low 0
53 Broomfield County 6.2 Very Low 0
54 Baca County 5.6 Very Low 0
55 Kit Carson County 4.7 Very Low 0
56 Lincoln County 4.3 Very Low 0
57 Prowers County 3.8 Very Low 0
58 Washington County 3.4 Very Low 0
59 Bent County 3.3 Very Low 0
60 Cheyenne County 2 Very Low 0
61 Sedgwick County 1.5 Very Low 0
62 Kiowa County 1.2 Very Low 0
63 Phillips County 0.7 Very Low 0
64 Crowley County 0.4 Very Low 0

Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.

Landslide risk nationally:

Top 50 US counties

Other hazard risks in Colorado:

WildfireInland FloodingCoastal FloodingEarthquakeHeat WaveTornadoHurricaneHailStrong WindWinter WeatherIce StormCold WaveLightningDroughtAvalancheTsunamiVolcanic Activity

Frequently asked questions

What is the highest landslide risk county in Colorado?

Mesa County, CO has the highest landslide risk in Colorado, with a FEMA National Risk Index score of 99.4 out of 100 (rated "Relatively High").

What causes landslide risk in Colorado?

Landslide risk covers expected losses from hillslope failures, rockfalls, and debris flows triggered by heavy rainfall, snowmelt, wildfire, or earthquakes. High scores concentrate in the Pacific Northwest, California coastal ranges, Appalachians, and Rocky Mountain foothills, where steep terrain combines with intense precipitation or seismic activity.