CHEYENNE, Wyo. (AP) — Truck drivers are flocking to Cheyenne to fill up their tanks because of its low diesel prices.

The Associated Press reports that filling stations at exit 7 on Interstate 25 were packed with truckers over the holiday weekend. Diesel is selling at around $4 a gallon, among the lowest in the country. Some locations were below $4 on Tuesday.

Some truckers said they had driven as much as 50 miles out of their way to fill up. Others plan their route to include a fill up in Cheyenne.

Harold Collins bought 200 gallons of fuel on Monday and said he saved between $60 and $70 by coming to Cheyenne.