Regional gas prices slightly declined for the second consecutive week and reached an average of $2.91 per gallon of regular fuel on Monday, down from last week's price of $2.94 per gallon, according to the U.S. Energy Information Administration.

The average fuel price in the Rocky Mountain region declined about 14 cents since last month. According to the EIA, gas prices across the region in the last year have been as low as $2.79 on Dec. 9, 2024, and as high as $3.24 on Sep. 8, 2025.

A year ago, the average gas price in the Rocky Mountain region was 6% higher at $3.08 per gallon.

>> INTERACTIVE: See how your area's gas prices have changed over the years at data.greatfallstribune.com .

The average gas price in the United States last week was $3.06, making prices in the Rocky Mountain

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