Big Trinity Lake - Rental Cabins
The numbers that decide it
Recreation.gov publishes no site-level detail for this campground, so we cannot say what length of rig it takes. Call the managing office before committing to it in a large vehicle.
Site-level detail from Recreation.gov, checked 2026-08-05. Where a field says “not published”, the agency has not published it — it does not mean zero.
Big Trinity Lake - Rental Cabins
The Big Trinity cabin and adjacent Little Trinity cabin offer a quiet retreat in a beautiful high alpine landscape. The cabins are situated within a popular summer recreation area with many activities to enjoy. The cabins have a limited season due to late snow melt, but they are accessible by car. Many creature comforts are provided. However, guests may want to bring some supplies and gear to make their experience more comfortable and enjoyable. Natural Features: The cabins are located in a lodgepole pine forest close to the East Fork Roaring River at an elevation of 7,900 feet. They’re nestled among four subalpine lakes: Big Roaring River Lake, Little Roaring River Lake, Big Trinity Lake and Little Trinity Lake. The peaks of the Boise Mountains surround the cabins, and Trinity Mountain, the tallest in the range at 9,700 feet, is just to the south. Snow can make this area inaccessible until early July, but soon afterward, the land is blanketed by colorful summer wildflowers. This area is a haven for elk and deer, but wildlife watchers may also spot an occasional black bear. Recreation: Hikers can access the 4-mile Rainbow Basin Trail System from Big Trinity Lake. The William H. Pogue National Recreation Trail and Lava Mountain Trail are for off-road vehicle enthusiasts, mountain bikers, hikers and horseback riders. Both of these trails can be accessed near Big Roaring River Lake. The Little Roaring River Trail at Little Roaring River Lake is also open to mountain bike, off-road vehicles and hiking. Anglers can fish in any of the nearby lakes for rainbow and cutthroat trout. The lakes are also ideal for exploring by canoe or kayak. Nearby Attractions: The summit of Trinity Mountain is the highest drivable point in Idaho, although the road may be blocked by snow until early July. A short, steep hike takes visitors to the lookout tower for panoramic views of several subalpine lakes and other mountains in the Boise Range.
Before you go
Reservations
Reservations accepted
Fees
Big Trinity cabin fits 6 people. Instructions for the combination lock on the door are located at the gate and cabin entrance; the combination is included in the reservation confirmation letter. No water is available in the cabins; it is only available from the outside hand pump. No garbage service; trash must be packed out. Candles are not permitted in the cabin. Phone service is one hour away. Camping is available on a first come, first served basis at four nearby campgrounds: Big Trinity, Big Roaring and Little Roaring.
Hours
Generally July 15 - October.
Scenic drives that pass close
Make it a night on a better road
Byway plans the drive in — real stops, real weather, nothing invented.