Rocky Mountain · week of September 21, 2026
Gas prices in the Rocky Mountain
How does the Rocky Mountain stack up? Regular runs $4.51, which is +3.2¢ versus the country as a whole, and it moved +7.2¢ this week. The 5 states in this group are Colorado, Idaho, Montana, Utah and Wyoming.
regional average
$4.510
EIA weekly survey
$4.510regional average
+7.2¢change in a week
+$1.33change in a year
$6.340diesel
Gas prices by state
| State | Regular | Price from | Diesel | Gas tax | With federal |
|---|---|---|---|---|---|
| Colorado | $4.257 | state survey | $6.340 | 30.2¢ | 48.6¢ |
| Idaho | $4.510 | Rocky Mountain | $6.340 | 33.0¢ | 51.4¢ |
| Montana | $4.510 | Rocky Mountain | $6.340 | 33.8¢ | 52.2¢ |
| Utah | $4.510 | Rocky Mountain | $6.340 | 38.6¢ | 57.0¢ |
| Wyoming | $4.510 | Rocky Mountain | $6.340 | 24.0¢ | 42.4¢ |
Regular gas, weekly average · Rocky Mountain
September 30, 2024: $3.415 · September 21, 2026: $4.510 · min $2.403 · max $4.587
Diesel, weekly average · Rocky Mountain
September 30, 2024: $3.612 · September 21, 2026: $6.340 · min $3.185 · max $6.340