Fishing spot: Lava Trail System (Hell's Half Acre)

Verified source data

Fishing feature type

Federal recreation area with fishing

Managing agency

Bureau of Land Management

Source directions

Hell's Half Acre Trail (Northbound I-15): Located about 20 miles southwest of Idaho Falls and 5 miles east of Blackfoot. While traveling northbound on Interstate 15, take the "Blackfoot Rest Area" exit. The interpretive trails are close to the parking area. Hell's Half Acre Trail (Southbound I-15): Located about 20 miles southwest of Idaho Falls and 5 miles east of Blackfoot. While traveling southbound on Interstate 15, take the "Blackfoot Rest Area" exit. The interpretive trails are close to the parking area. Twenty Mile Trail: Travel west from Idaho Falls on Highway 20 to mile maker 287. Continue 0.3 miles until reaching a sign noting "Lava Trail". Turn south onto the gravel road and continue one-quarter mile to the trailhead.

Phone

208-524-7500

Reservable

No

Source last updated

2026-02-25

Data source: Recreation.gov RIDB · Use terms · Source snapshot: 2026-10-03