Boise Air Terminal is Idaho's main airport and the gateway to the state's mountains and high desert, and the honest answer on lounges is short: there are none. Setting that expectation before you fly lets you plan around the terminal's amenities instead of hunting for a lounge that does not exist.
Lounges at Boise
Boise does not have any airport lounges. There is no private or airline lounge, and no pay-per-use lounge either, so no membership, credit card, or day pass provides lounge access here. This is common at airports of Boise's size, where the terminal focuses on efficient, comfortable transit rather than premium facilities. If you are used to lounges at bigger hubs, reset expectations for Boise.
Priority Pass and access
Because there are no lounges at Boise, a Priority Pass will not find a participating lounge, and neither will LoungeKey, DragonPass, or a premium credit card's lounge benefit. There is no walk-in day pass to buy. If lounge access matters for your journey, it will realistically come at your connecting hub, such as Seattle, Salt Lake City, or Denver, rather than at Boise itself, so plan your connection time accordingly.
Tips
With no lounge, plan to use Boise's terminal amenities: the airport offers free Wi-Fi and charging stations throughout, along with cafes and restaurants for food and drink before your flight. Boise is a calm, easy airport to move through, with short lines by big-hub standards, which for many travellers more than offsets the lack of a lounge. Use the comparison below to understand general lounge access methods, keeping in mind that none of them currently apply at Boise itself. If a comfortable pre-flight wait matters to you, the practical play is a good meal at one of the terminal restaurants, a charged phone, and a seat near your gate, all of which Boise makes easy to find even at its busiest morning departure banks.