303
Recorded events
25
Counties affected
7
Direct deaths
$161.3M
Property damage
Colorado debris flow history: 303 recorded events across 25 counties between 2003 and 2025.
Decade by decade
Colorado debris flow history by decade
The 2020s are the busiest decade on record with 173 reported debris flow events across Colorado. Earlier decades are thinner because systematic reporting for this hazard expanded over time, not because the weather was calmer.
County ranking
Counties with the most debris flow events in Colorado
| Rank | County | Events | Deaths | Damage | Span |
|---|---|---|---|---|---|
| #1 | San Miguel County | 34 | 0 | $540K | 2013–2025 |
| #2 | Garfield County | 34 | 0 | $153.4M | 2013–2024 |
| #3 | Pitkin County | 25 | 0 | $897K | 2016–2025 |
| #4 | Rio Blanco County | 25 | 0 | $62K | 2013–2025 |
| #5 | Mesa County | 19 | 3 | $219K | 2013–2025 |
| #6 | Ouray County | 17 | 0 | $551K | 2013–2024 |
| #7 | La Plata County | 13 | 0 | $4K | 2016–2025 |
| #8 | Gunnison County | 13 | 0 | $51K | 2013–2024 |
| #9 | Eagle County | 11 | 0 | $510K | 2013–2024 |
| #10 | Montrose County | 9 | 0 | $9K | 2013–2024 |
| #11 | San Juan County | 8 | 0 | $28K | 2020–2025 |
| #12 | Archuleta County | 6 | 0 | $12K | 2018–2025 |
| #13 | Hinsdale County | 4 | 0 | $6K | 2013–2024 |
| #14 | Montezuma County | 4 | 0 | $11K | 2022–2024 |
| #15 | Huerfano County | 3 | 0 | $0 | 2020–2025 |
| #16 | Routt County | 2 | 0 | $0 | 2017–2023 |
| #17 | Chaffee County | 2 | 0 | $0 | 2015–2022 |
| #18 | Custer County | 1 | 0 | $0 | 2020–2020 |
| #19 | Mineral County | 1 | 0 | $0 | 2022–2022 |
| #20 | Fremont County | 1 | 0 | $0 | 2015–2015 |
| #21 | Delta County | 1 | 0 | $2.0M | 2023–2023 |
| #22 | Saguache County | 1 | 0 | $0 | 2025–2025 |
| #23 | Moffat County | 1 | 0 | $2K | 2021–2021 |
| #24 | Conejos County | 1 | 0 | $0 | 2022–2022 |
| #25 | El Paso County | 1 | 0 | $0 | 2020–2020 |
Significant events
Deadliest debris flow events in Colorado
| Date | County | Scale | Deaths | Injuries |
|---|---|---|---|---|
| May 25, 2014 | Mesa County | — | 3 | 0 |