EXPLORE Central Corridor The Center of It All! Idaho Falls Rexburg Rigby & Ririe St. Anthony Sugar City Off The Beaten Path Dubois Spencer Yellowstone Teton Loop Ashton Grand Teton National Park Island Park Swan Valley Teton Valley Yellowstone National Park PLAY Arts & Culture Attractions Annual Events Family Fun Shopping & Dining Outdoor Recreation ATV/Off Roading Biking Boating Fishing Golf Guides & Tours Hiking Horseback Riding Hot Springs Hunting Rock Climbing Scenic Drives Skiing/Snow Sports Snowmobiling STAY Campgrounds Guest Ranches & Lodges Hotels & Motels Large Group Accomodations RV Parks Vacation Rentals PLAN Getting Here Event Planning Annual Events Event Centers & Venues Event Rentals Hotels With Meeting Spaces Lodging Meeting Spaces Sporting Event Facilities Maps & Guides Tour Operators Transportation View Regional Webcams Spring Summer Fall Winter YTT About YTT Ad Submission YTT Grant Application Become a YTT Member Blog Events Calendar Newsletter Signup Contact Us Hell's Half Acre Lava Field Prehistoric lava flow covering 162 square miles with hiking trails and interpretive signshttps://www.blm.gov/visit/lava-trail-system-hells-half-acreExit 95 off I-15, 20 miles west of Idaho Falls(208) 524-7500Visit the Lava Field Open daily, dawn to dusk. Free admission.