The deadliest roads in Colorado
I-25 had the most fatal crashes of any numbered road in Colorado from 2015 to 2024: 331, with 367 deaths. The 60 roads listed held 52% of all fatal crashes in Colorado from 2015 to 2024; 5 are interstates, 13 US routes, 42 state highways.
128 numbered roads in Colorado recorded a fatal crash in those years; the 60 with 5 or more are ranked below, and 20 have a page of their own. All fatal crashes in Colorado.
Every numbered road in Colorado, ranked by fatal crashes
| Road | Kind | Fatal crashes | Deaths | 2022 to 2024 | Counties with the most | |
|---|---|---|---|---|---|---|
| 1 | I-25 | Interstate | 331 | 367 | 105 | El Paso, Pueblo, Larimer |
| 2 | I-70 | Interstate | 287 | 322 | 97 | Garfield, Arapahoe, Denver |
| 3 | US 287 | US route | 177 | 210 | 62 | Larimer, Boulder, Adams |
| 4 | US 40 | US route | 175 | 193 | 66 | Denver, Jefferson, Arapahoe |
| 5 | US 50 | US route | 162 | 177 | 48 | Pueblo, Fremont, Gunnison |
| 6 | US 85 | US route | 144 | 169 | 48 | Weld, Adams, Douglas |
| 7 | US 160 | US route | 136 | 146 | 40 | La Plata, Montezuma, Archuleta |
| 8 | I-76 | Interstate | 122 | 137 | 32 | Adams, Weld, Morgan |
| 9 | US 24 | US route | 106 | 119 | 31 | El Paso, Teller, Park |
| 10 | US 285 | US route | 102 | 110 | 29 | Jefferson, Park, Arapahoe |
| 11 | US 6 | US route | 100 | 108 | 30 | Jefferson, Mesa, Adams |
| 12 | US 34 | US route | 93 | 109 | 37 | Weld, Larimer, Morgan |
| 13 | State Highway 83 | State highway | 70 | 78 | 20 | Douglas, Arapahoe, El Paso |
| 14 | State Highway 121 | State highway | 62 | 64 | 16 | Jefferson, Broomfield, Denver |
| 15 | US 550 | US route | 57 | 60 | 14 | Ouray, La Plata, Montrose |
| 16 | US 36 | US route | 53 | 58 | 20 | Boulder, Adams, Arapahoe |
| 17 | State Highway 95 | State highway | 49 | 51 | 22 | Denver, Jefferson, Adams |
| 18 | State Highway 14 | State highway | 48 | 52 | 21 | Weld, Larimer, Jackson |
| 19 | State Highway 88 | State highway | 46 | 47 | 16 | Denver, Arapahoe |
| 20 | State Highway 30 | State highway | 42 | 47 | 15 | Arapahoe, Denver |
| 21 | State Highway 119 | State highway | 41 | 46 | 14 | Boulder, Weld, Gilpin |
| 22 | State Highway 96 | State highway | 38 | 40 | 7 | Pueblo, Custer, Crowley |
| 23 | State Highway 470 | State highway | 36 | 38 | 15 | Jefferson, Adams, Douglas |
| 24 | State Highway 115 | State highway | 34 | 36 | 13 | Fremont, El Paso |
| 25 | State Highway 2 | State highway | 30 | 33 | 13 | Denver, Adams |
| 26 | I-225 | Interstate | 28 | 33 | 12 | Arapahoe, Adams, Denver |
| 27 | State Highway 392 | State highway | 27 | 30 | 7 | Weld, Larimer |
| 28 | State Highway 391 | State highway | 27 | 28 | 11 | Jefferson |
| 29 | State Highway 9 | State highway | 27 | 28 | 7 | Summit, Park, Fremont |
| 30 | State Highway 52 | State highway | 26 | 28 | 7 | Weld, Morgan, Boulder |
| 31 | State Highway 66 | State highway | 24 | 26 | 5 | Boulder, Weld |
| 32 | State Highway 71 | State highway | 23 | 23 | 11 | Lincoln, Morgan, Weld |
| 33 | State Highway 13 | State highway | 22 | 24 | 7 | Rio Blanco, Garfield, Moffat |
| 34 | State Highway 141 | State highway | 22 | 23 | 8 | Mesa, Montrose, San Miguel |
| 35 | State Highway 145 | State highway | 22 | 22 | 9 | San Miguel, Montezuma, Dolores |
| 36 | State Highway 21 | State highway | 22 | 22 | 7 | El Paso |
| 37 | State Highway 82 | State highway | 21 | 22 | 8 | Garfield, Pitkin, Lake |
| 38 | State Highway 72 | State highway | 20 | 23 | 9 | Jefferson, Boulder |
| 39 | State Highway 45 | State highway | 20 | 22 | 11 | Pueblo |
| 40 | State Highway 94 | State highway | 20 | 21 | 4 | El Paso, Lincoln |
| 41 | State Highway 7 | State highway | 19 | 20 | 8 | Adams, Boulder, Larimer |
| 42 | State Highway 67 | State highway | 18 | 18 | 3 | Douglas, Teller, Fremont |
| 43 | State Highway 70 | State highway | 16 | 16 | 3 | Mesa, Garfield |
| 44 | I-270 | Interstate | 15 | 15 | 6 | Adams, Denver |
| 45 | US 491 | US route | 14 | 16 | 5 | Montezuma, Dolores |
| 46 | State Highway 65 | State highway | 14 | 15 | 7 | Delta, Mesa |
| 47 | State Highway 69 | State highway | 14 | 14 | 8 | Custer, Huerfano, Fremont |
| 48 | State Highway 92 | State highway | 14 | 14 | 4 | Delta, Gunnison, Weld |
| 49 | State Highway 17 | State highway | 12 | 13 | 5 | Alamosa, Conejos, Saguache |
| 50 | US 385 | US route | 12 | 13 | 3 | Yuma, Sedgwick, Cheyenne |
| 51 | State Highway 257 | State highway | 11 | 14 | 4 | Weld |
| 52 | State Highway 93 | State highway | 11 | 12 | 4 | Boulder, Jefferson |
| 53 | State Highway 79 | State highway | 10 | 13 | 1 | Adams, Weld |
| 54 | State Highway 78 | State highway | 10 | 12 | 3 | Pueblo |
| 55 | State Highway 60 | State highway | 9 | 11 | 2 | Weld, Larimer |
| 56 | State Highway 149 | State highway | 9 | 10 | 4 | Gunnison, Hinsdale, Mineral |
| 57 | State Highway 16 | State highway | 9 | 10 | 2 | El Paso |
| 58 | State Highway 91 | State highway | 9 | 10 | 3 | Lake, Summit |
| 59 | State Highway 133 | State highway | 8 | 10 | 2 | Delta, Pitkin, Garfield |
| 60 | State Highway 135 | State highway | 8 | 10 | 2 | Gunnison |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Download every numbered road in Colorado as CSV. Free to reuse with credit: “Fatal Crash Data, fatalcrashdata.com/deadliest-roads/colorado/, from NHTSA FARS (2024 Annual Report File).”
Interstates in Colorado per mile
Fatal crashes a year per 100 miles of road, 2015 to 2024, for interstates with 20 miles or more in Colorado. Crashes per mile of road, not per vehicle. Mileage from the FHWA Interstate route log.
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Questions about the deadliest roads in Colorado
- What is the deadliest road in Colorado?
- I-25 had the most fatal crashes of any numbered road in Colorado from 2015 to 2024: 331, with 367 deaths. I-70 was second with 287 and US 287 third with 177. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- Which interstate in Colorado is the most dangerous per mile?
- I-25, with 11.1 fatal crashes a year per 100 miles over 2015 to 2024 on 299 miles. That is crashes per mile of road, not per vehicle.
- How many fatal crashes in Colorado happen on numbered roads?
- 3,354 of 6,017 fatal crashes in Colorado from 2015 to 2024 (56%) were filed on an interstate, US or state route; the rest were on county roads, city streets and unnamed roads, which are in the state's total but not ranked here.
Where the Colorado road numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash filed on a numbered interstate, US or state route in Colorado, read from the road name NHTSA filed, with ramps, frontage and service roads left out. A road gets its own page with 15 or more fatal crashes from 2022 to 2024. The full method.