Costco Gas Prices in Boise, ID
Members at Costco Boise (2051 S Cole Rd) are paying $4.34/gal for Regular as of Aug 21, 2026. A local quirk worth knowing: this station's gasoline is ethanol-free across all grades — rare for a discount station, and a big deal for small-engine and classic-car owners across the Treasure Valley.
Today's Costco Member Gas Prices
Costco Gas Station, 2051 S Cole Rd, Boise, ID. Prices are for Costco members and are updated when station prices change.
Ethanol-free at Costco Boise
Unlike most stations in Idaho, the Boise Costco pumps ethanol-free 87, 89 and 91 octane. Boaters, motorcyclists and anyone storing fuel over winter often make the trip for this alone — at a price that still undercuts regular E10 fuel nearby.
Membership and payment
Scan your Costco membership card at the pump. Visa credit cards, most debit cards and Costco Shop Cards work; Mastercard, Amex and cash do not.
How we track this price
Every price change is recorded daily, so the trend chart above shows the real movement — useful for timing a fill-up when Idaho prices swing.