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Hell's Half Acre, Idaho Falls

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Hiking Trail Wildlife Area
Hell's Half Acre Lava Field is a basaltic lava plain located on the Snake River Plain of Idaho in the United States. It is the easternmost of the basaltic lava fields on the Snake River Plain, located about west of Idaho Falls, Idaho and north of Pocatello, Idaho. In 1976, the National Park Service designated the northwestern portion of the site a National Natural Landmark. In 1986, the Bureau of Land Management recommended that of the site, located just southeast of the National Natural Landmark, to be a wilderness study area.Description of the siteThe Hell's Half Acre lava plain is located in Bingham and Bonneville counties in the state of Idaho. The site is about 150mi2 in size. The area where a former lava lake existed is marked by a 875yd long by 328yd wide depression near the summit of the lava field. Ten circular pits and two large lava tubes are also located near the summit. Two major lava flows, each about long by wide, extend from the main lava field to the south and southwest. These two lava flows surround "Morgans Pasture," a kipuka (or older geologic feature which was not covered by lava). More recently, scientists studying aerial photographs of the site discovered a 328yd long eruptive fissure partly buried under lava flows just from the northwest boundary of the lava field. This and other features of the site indicate that the fissure vent itself may be long.
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11 days in Idaho Falls BY A USER FROM UNITED STATES July, popular PREFERENCES: July ATTRACTION STYLE: Popular PACE: Medium 7 days in Idaho Falls & Montana BY A USER FROM UNITED STATES September, popular PREFERENCES: September ATTRACTION STYLE: Popular PACE: Medium 2 days in Idaho Falls BY A USER FROM CANADA July, teens, culture, outdoors, relaxing, beaches, historic sites, museums, shopping, popular PREFERENCES: July, teens, culture, outdoors, relaxing, beaches, historic sites, museums, shopping ATTRACTION STYLE: Popular PACE: Medium 24 days in United States BY A USER FROM UNITED STATES September, popular PREFERENCES: September ATTRACTION STYLE: Popular PACE: Medium 4 days in United States BY A USER FROM UNITED STATES September, popular PREFERENCES: September ATTRACTION STYLE: Popular PACE: Medium 7 days in Idaho Falls BY A USER FROM UNITED ARAB EMIRATES August, popular PREFERENCES: August ATTRACTION STYLE: Popular PACE: Medium 14 days in Idaho BY A USER FROM UNITED STATES July, outdoors, relaxing, beaches, hidden gems PREFERENCES: July, outdoors, relaxing, beaches ATTRACTION STYLE: Hidden gems PACE: Medium 3 days in Idaho Falls BY A USER FROM UNITED STATES August, outdoors, relaxing, slow & easy, popular PREFERENCES: August, outdoors, relaxing ATTRACTION STYLE: Popular PACE: Slow & easy 12 days in Idaho BY A USER FROM UNITED STATES September, culture, hidden gems PREFERENCES: September, culture ATTRACTION STYLE: Hidden gems PACE: Medium 3 days in Idaho Falls BY A USER FROM UNITED STATES July, outdoors, relaxing, historic sites, museums, shopping, popular PREFERENCES: July, outdoors, relaxing, historic sites, museums, shopping ATTRACTION STYLE: Popular PACE: Medium 5 days in United States BY A USER FROM UNITED STATES September, popular PREFERENCES: September ATTRACTION STYLE: Popular PACE: Medium 30 days in Idaho BY A USER FROM UNITED STATES August, popular PREFERENCES: August ATTRACTION STYLE: Popular PACE: Medium
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  • The power of Earth is displayed here, with the Grand Tetons and Snake River backgrounds. Very easy to locate, literally AT the rest-stop and without crowds. Although the depressions from these eruptio...  more »
  • We always stop when we pass through here. You get such a sense of the power of nature. All that volcanic rock was once molten.  more »
  • We followed the Trip Advisor map and ended up NORTH of Idaho Falls in the middle of nowhere just south of mile marker 128. We finally found the right spot at the rest stop at mile marker 101 between I...  more »