a very unquie cave South of shoshone ID.  cave has a old dynamite container as you enter into the cave   also a free standing bridge outside the entrance of the cave

fun cave south of mammoth cave.  cave has N and S cave the South is a much more fun the N cave

This is one of the more fun caves in the area located next to the t cave this cave has a upper lower tunnels both meet in the back the lower has a cave in but you can drop back in it a little further down

This cave sits just north of the gwinn cave and mammoth cave and SW of the Maze cave   you enter the cave and go back about 300 yards or more and you come to a great big T where you can go left and right about .25 mi each way

Gwinn and gwinn cave is located near the famous Idaho Mammoth cave this cave you decend down a ladder and cave goes back in at least a quarter mile. great spot to camp

massive lava tube where you descend a ladder cave is a little more then a .25 miles long

Clay Caves is a genuinely wild lava-tube caving destination on the volcanic Snake River Plain of southern Idaho, out in the sagebrush country reached within a half-hour drive from the Twin Falls area. This is not a developed show cave with lights and railings; it's a raw, dark, undeveloped lava tube said to run more than a mile into the earth, the kind of place that rewards the well-prepared and genuinely punishes the careless. For experienced, equipped explorers, it's one of the more adventurous caves in the region.

The cave itself is a classic basalt lava tube. The entrance opens up and the passage leads for over a mile underground, fairly open and roomy at the beginning before narrowing as it extends deeper into the ground. That combination, a big walkable start that tightens the further you go, is part of what makes it appealing and part of what makes it dangerous: it's easy to keep going, and easy to lose track of the way out.

Come properly equipped or don't go past the entrance. Beyond roughly the first 100 yards, headlamps and backup flashlights are absolutely required, and people have genuinely gotten lost deep within the cave. Multiple, independent light sources, a helmet, sturdy boots, warm layers (lava tubes stay cold year-round), and ideally a partner and someone who knows your plan are the baseline for a cave like this. Do not rely on a phone flashlight.

Access is part of the adventure and part of the filter. The approach involves gravel roads best suited to a high-clearance vehicle, and walking the last stretch is often the smarter choice given the rough, uneven surface; plan on a hike of over a mile to reach the cave, watching for the marked "cave" rock. This is remote, exposed high-desert country with no services and limited cell coverage.

The best conditions are the shoulder seasons and cooler months for the surface approach, since the surrounding plain bakes in summer, while the cave interior holds a cold, steady temperature all year. There's no water and no shade out here.

Bring at least two reliable light sources per person plus spare batteries, a helmet, gloves, warm layers, sturdy footwear, plenty of water, and a partner. Tell someone where you're going and when you'll be back. Tread lightly and take nothing, as lava tubes are fragile environments. For prepared, experienced cavers looking for a real underground adventure on the Snake River Plain, Clay Caves delivers a genuinely wild mile into the dark.

Lariat Cave is a massive lava tube out on the high desert near American Falls, Idaho — one of the biggest caves in this volcanic corner of the state, in the same lava country that runs toward Craters of the Moon. For cavers and adventurous families, it's a genuinely impressive underground space: a huge, dark tunnel carved by ancient molten lava, cool and quiet no matter the weather above.

The cave is a classic lava tube, formed when the surface of a lava flow hardened while the molten rock beneath drained away, leaving a hollow passage behind. Lariat is notably large, and part of the fun is a loop near the back of the cave: the passage splits about two-thirds of the way in, letting you make a circuit rather than simply backtracking. It stays at a constant, cool temperature year-round, which has long made it popular — Boy Scout troops have used it as a sheltered campsite, much like the well-known Dead Horse Cave over near Gooding.

Getting there is the real challenge. The cave is reached via a rough dirt road off Crystal Ice Cave Road — the final stretch runs about 1.5 miles of deeply rutted dirt that is not suitable for low-clearance vehicles. In heavy rain or spring snowmelt it can turn to impassable mud, and it may be blocked by snow for much of the winter, with the cave entrance itself sometimes buried until the end of April. Plan your visit for dry summer or early-fall conditions, and bring a high-clearance or four-wheel-drive vehicle.

The cave sits in a fascinating volcanic landscape. This part of the Snake River Plain near American Falls is dotted with lava tubes and features, including the well-known Crystal Ice Cave along the same access road — a nearby cave famous for its ice formations. Exploring Lariat pairs naturally with a broader day poking around the volcanic country of southeastern Idaho, so bring good maps and plan your route, since these backroads are remote and lightly traveled.

Come prepared with proper caving gear. Bring at least two light sources per person (the cave is completely dark), wear a helmet and sturdy, closed-toe shoes for the rocky floor, and pack a warm layer, since it stays chilly inside even on the hottest day. This is remote country with little cell service, so don't go alone and tell someone your plans.

Tread lightly out here: pack out everything you bring, don't disturb any wildlife (including bats) using the cave, and leave the passages as you found them. For those willing to brave the road, Lariat Cave rewards you with one of the largest and most enjoyable lava-tube explorations in the American Falls area.