Landmark · Twin Falls County
Balanced Rock
A 48-foot mushroom-shaped rock balanced on a tiny base above Salmon Falls Creek canyon, with a short, steep path up to it.
- 1 hr · Easy to moderate
- Best April to October
- Free (check)
- On back roads southwest of Buhl, past Castleford. Map "Balanced Rock" itself, not the county park half a mile away in the canyon.
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Canyon · Gooding County
Box Canyon Springs
A short rim walk looks down on a blue-green spring pouring out of the canyon wall, one of the largest springs in North America.
- 1-2 hrs · Easy to moderate
- Year-round
- Idaho State Parks entrance fee (per vehicle) or Idaho State Parks Passport (check)
- Part of Thousand Springs State Park. The trail down into the canyon is steeper and has no shade.
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Wildlife · Camas County
Camas Prairie Centennial Marsh
Each spring this high prairie wetland near Fairfield turns blue with camas lilies and fills with waterbirds.
- 1-2 hrs · Easy
- Best late May to early June
- Free (check)
- Usually dry by mid-July, and snow can block the roads into early spring. Bring binoculars; few facilities.
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State park · Cassia County
Castle Rocks State Park
A quieter neighbor to City of Rocks, with granite towers, a historic ranch, and trails for hiking, climbing and riding.
- 2-3 hrs · Easy to moderate
- Best May to October (open year-round)
- Idaho State Parks entrance fee (per vehicle) or Idaho State Parks Passport
- Prescribed burns run some mornings through November 30, 2026, but trails stay open. In winter the visitor center is open Tuesday to Saturday.
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National park · Cassia County
City of Rocks National Reserve
Granite spires and domes up to 60 stories tall, world-class climbing, and names California Trail emigrants wrote on the rocks in wagon grease.
- Half day · Easy to moderate
- Best May to October (open year-round)
- Free
- Roads inside are gravel or dirt and get muddy. The Oakley approach is washboarded; the Almo approach is paved.
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National monument · Butte County
Craters of the Moon National Monument and Preserve
A huge, strange lava field with a 7-mile loop road past cinder cones, spatter cones and lava tubes you can walk into with a flashlight.
- Half day · Easy to moderate
- Best May to October (Loop Road not fully open about November to April)
- NPS entrance fee (per vehicle) or America the Beautiful pass (waived when the Loop Road isn't fully open)
- Caves need a free permit from the visitor center and close once ice sets in. No dogs on trails or the lava, and little shade.
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Museum · Butte County
Experimental Breeder Reactor I
In 1951 this reactor became the first in the world to make usable electricity; walk through the control room and see the reactor hardware in the open desert.
- 1-2 hrs · Easy
- Summer only, about Memorial Day to Labor Day
- Free
- On US 20/26 about 18 miles southeast of Arco, with no services nearby. Summer hours (check).
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National monument · Twin Falls County
Hagerman Fossil Beds National Monument
A visitor center shows fossils of the Hagerman horse and other Ice Age animals; nine miles away, overlooks and a 3-mile trail follow the Snake River bluffs and Oregon Trail ruts.
- 2-3 hrs · Easy to moderate
- Year-round (visitor center open fewer days off-season; check)
- Free
- The fossils are only at the visitor center in Hagerman. Dogs only on paved areas, and the overlooks and trail have no shade or water.
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Lake · Minidoka County
Lake Walcott State Park
A shady lawn on a Snake River reservoir next to Minidoka National Wildlife Refuge, for birding, fishing, paddling and disc golf.
- 2-3 hrs · Easy
- Best May to September (boating April to October)
- Idaho State Parks entrance fee (per vehicle) or Idaho State Parks Passport
- Water-system construction in fall 2026 may close the campground and pavilions (check).
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Canyon · Gooding County
Malad Gorge
A 250-foot-deep slot gorge right off I-84, with a footbridge over the Devil's Washbowl falls and rim paths along the canyon.
- 1-2 hrs · Easy
- Year-round
- Idaho State Parks entrance fee (per vehicle) or Idaho State Parks Passport
- Take I-84 to the Tuttle exit. Day use is 7 a.m. to 10 p.m.; in the off-season the back gate is closed to cars but you can walk in.
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Historic site · Jerome County
Minidoka National Historic Site
A sobering walk through the WWII camp where more than 13,000 Japanese Americans were held, with restored barracks, a guard tower and trailside exhibits.
- 1-2 hrs · Easy
- Grounds year-round; visitor center May to late September
- Free
- Grounds open sunrise to sunset daily; the visitor center is open Friday to Sunday in season, and there are no restrooms when it's closed.
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Waterfall · Gooding County
Niagara Springs
Springwater pours out of the canyon wall in white cascades into a clear pool at the bottom of the Snake River Canyon, a peaceful picnic spot.
- 1-2 hrs · Easy
- Best late May to early September (day use open summer only)
- Idaho State Parks entrance fee (per vehicle) or Idaho State Parks Passport
- The road down is narrow and steep and not for trailers. Outside summer it's walk-in only.
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Landmark · Twin Falls County
Perrine Bridge
A 1,500-foot steel bridge almost 500 feet above the Snake River, one of the few places in the US where BASE jumpers leap legally, with canyon overlooks by the visitor center.
- 1 hr · Easy
- Year-round
- Free
- Park at the Twin Falls Visitor Center on the south rim, where jumpers often stage. The east-side path (about 0.6 mile) has the overlooks.
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Historic site · Gooding County
Ritter Island
A historic dairy farm on a river island, with springs pouring off the canyon wall across the water, lawns, old barns and good birding.
- 1-2 hrs · Easy
- Open Memorial Day to Labor Day, Thursday to Monday, 10 a.m. to 3 p.m.
- Idaho State Parks entrance fee (per vehicle) or Idaho State Parks Passport
- Closed outside summer. The access road is narrow and steep with very limited parking and no turnaround for RVs.
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Waterfall · Twin Falls County
Shoshone Falls
The Snake River drops 212 feet over a rim wider than Niagara, seen from viewing decks a short walk from the car, with Dierkes Lake for swimming and fishing in the same park.
- 1-2 hrs · Easy
- Best April to June (flow is lowest in late summer and fall)
- City of Twin Falls vehicle fee from March 1 through fall; free in winter (check)
- The falls can shrink to a trickle once irrigation season starts, so go in spring. Dogs leashed and not on the Dierkes Lake lawn; open dawn to dusk.
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Trail · Twin Falls County
Snake River Canyon Rim Trail
A paved path of about 7.6 miles along the canyon rim with views of the Perrine Bridge, Pillar Falls and Shoshone Falls; easy to walk just a piece of it.
- 1-3 hrs · Easy
- Year-round
- Free
- Trailheads include the visitor center, Federation Point and the Evel Knievel jump site; some close for construction from time to time.
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