PADD 4 (Rocky Mountain) Gas Prices
Current average fuel prices for PADD 4 (Rocky Mountain), sourced from the U.S. Energy Information Administration's weekly retail survey, plus a calculator prefilled with the local price.
Weekly price trend, regular gasoline
View regular gasoline trend as a table
| Week of | Price per gallon |
|---|---|
| Jun 1 | $4.329 |
| Jun 8 | $4.194 |
| Jun 15 | $4.104 |
| Jun 22 | $3.845 |
| Jun 29 | $3.715 |
| Jul 6 | $3.661 |
| Jul 13 | $3.823 |
| Jul 20 | $3.956 |
What shapes the price in PADD 4 (Rocky Mountain)
PADD 4 includes Colorado, Wyoming, Montana, Utah, and Idaho. Isolated by mountain terrain, the region relies on regional refineries processing local crude, with high transportation costs and high-altitude 85-octane regular gasoline.
U.S. retail gasoline prices follow a reliable seasonal cycle. Prices typically rise between February and May as refineries conduct scheduled seasonal maintenance (turnarounds) and switch production from winter-grade fuel to more expensive, low-RVP (Reid Vapor Pressure) summer blends designed to reduce ground-level smog in hot weather. Increased summer vacation driving further boosts demand. Conversely, prices typically soften following Labor Day as refiners transition back to lower-cost winter blends containing inexpensive butane, alongside lower cold-weather driving demand.
Calculate your fuel cost in PADD 4 (Rocky Mountain)
Calculator Parameters
This is an estimated default price. Automatic price detection only applies to visitors in the United States. Everyone else can select their own currency and enter a local price below for an accurate result.
Enter total travelers to split gas cost fairly.
Your Calculation Results
High Consumption (> 8.5 L/100km)- Total Fuel Needed (for this trip)
- 8.88 US gallons (33.6 liters total)
- Total Fuel Cost (for this trip)
- $35.15
- Cost breakdown per distance unit
- $0.566 per mile • $0.352 per km
Fuel economy in every unit
- L/100km
- 33.6
- MPG US
- 7.0
- MPG UK
- 8.4
- km/L
- 3.0
The fuel calculator above is prefilled with PADD 4 (Rocky Mountain)'s current regular gasoline price. If your vehicle requires high-octane premium or runs on diesel, replace the default price with the corresponding regional price above to see your exact cost per mile and total trip fuel expense.
Driving an EV instead?
Drivers operating an electric vehicle (EV) are not directly impacted by gasoline or diesel pump prices. Instead, EV charging costs depend on local residential and public electricity rates measured in cents per kilowatt-hour (kWh). To evaluate how electricity costs compare to gasoline in this region, use our EV versus Gas Comparator.
Open the EV versus gas comparatorLast updated July 24, 2026 at 8:39 AM UTC. Prices are refreshed from U.S. EIA weekly retail survey data.
Nearby regions
Frequently asked questions
PADD 4 is geographically separated by the Rockies, relying on regional refineries in Salt Lake City, Denver, and Billings. Many stations offer 85 octane for high-elevation driving.
Premium gasoline has a higher octane rating (91 to 93 AKI), which prevents premature engine knock in high-compression and turbocharged engines. Producing high octane requires additional refinery processing steps such as catalytic alkylation and reforming, and retailers price it with wider retail margins, resulting in a consistent 50 to 70 cent premium over regular.
Price figures for PADD 4 (Rocky Mountain) are derived from the U.S. Energy Information Administration's (EIA) official retail survey, updated on a weekly schedule. Individual street-corner stations adjust their posted board prices daily based on wholesale rack spot price shifts.