Explore volcanic terrain on the Lava Trail System at Hell's Half Acre near Blackfoot. BLM describes two developed interpretive trails and a separate primitive route, so choose a trailhead before navigating.
Plan your visit
Blackfoot, Idaho
- Admission
- General admission policy is not published in the reviewed source
- Hours
- Check current visiting times before travel
- Parking
- Rest-area trailheads and a separate primitive-trail access; choose your route
- Restrooms
- Current availability needs confirmation
- Access
- Specific accessible facilities are not documented; confirm your needs
Photos have not been added to this listing yet.
🌳 Amenities & Features
- Volcanic rock formations
- Developed interpretive walks
- A separate primitive trail option
💡 Good to Know
- Developed trails are reached from the northbound and southbound Blackfoot rest areas on I-15.
- The Twenty Mile Trail is a different access point off US 20; use BLM directions rather than treating all routes as one trailhead.
- Sharp lava, cracks and exposed ground call for sturdy shoes and close supervision. Trails are nonmotorized.
Listing review date: 2026-10-15