Jackson, WY to Lava Hot Springs, ID: A Scenic Road Trip Guide

US Highway 89 from Jackson, Wyoming to Lava Hot Springs, Idaho covers approximately 180 miles (290 km) of the Rocky Mountain West. This route crosses the rugged Snake River Range and the Caribou-Targhee National Forest, winding through historic railway towns and volcanic hot spring basins. The drive typically takes 4 hours without stops, but the area is rich with geothermal features, wildlife corridors, and frontier history. The route uses US-89 north, then left onto US-26/US-89, and finally ID-34 into Lava Hot Springs — a sequence that has served as a critical north-south artery since the early 20th century. Geographically, the journey descends from Jackson’s 6,237-foot elevation to Lava Hot Springs’ 5,020 feet, passing through the Gray’s Lake National Wildlife Refuge — a key stopover for sandhill cranes.

For travelers seeking curated stopping points and unique diversions, how to find the best stops and hidden gems between cities offers strategies beyond the main highway. The following table summarizes core logistics:

Infrastructure Safety & Road Quality

US-89 is well-maintained but narrow and winding in sections near the canyon. Shoulders are often gravel or non-existent. Deer and elk crossings are common, especially at dawn and dusk — reduce speed in wildlife zones (marked with signs). Cell service is absent between Alpine and Soda Springs; rent a satellite messenger if traveling solo in winter. Idaho State Police patrols are infrequent but present. In winter, heavy snow can cause whiteouts; use low beams and keep windows clear. The road quality is good year-round, though potholes may appear in spring.

Family and Child Suitability

This trip is excellent for families. The Lava Hot Springs pools have a zero-entry kiddie pool (98°F) and a diving area. The natural river hot spring is shallow and safe with supervision. The Gray's Lake boardwalk is stroller-friendly, and kids love spotting cranes and pronghorns. The Soda Springs geyser eruption (on the hour) mesmerizes toddlers. Pack snacks and entertainment for the two hour stretch through Star Valley. Afton's antler arch provides a unique photo op. Most restaurants offer children's menus. The route's drivable length (4 hours) is manageable for most families without meltdowns.

Pet-Friendly Framework

Pets are allowed at many stops. Leashed dogs can walk the Gray's Lake boardwalk (muddy sections may require carrying). In Lava Hot Springs, dogs are not allowed in the municipal pools, but the nearby Bannock Creek trail is pet-friendly. Many pullouts along the Snake River Canyon allow dogs on-leash. Several hotels in Jackson and Lava Hot Springs are pet-friendly, including the Super 8 in Lava (pet fee $20). The route's long drive requires frequent breaks for pets; plan stops every 90 minutes. Bring water and a bowl — summertime heat can be intense in the valley.

Hidden Off-Route Spots

• St. Charles Canyon (14 miles north of Soda Springs off ID-34) — a narrow gorge with a waterfall hike (<1 hour round trip).
• Paris Springs (near Bern, ID) — a series of natural mineral springs along a dirt road; use a detailed map.
• Crystal Springs (west of Lava) — a quiet hot spring pool with fewer crowds, but requires a 1-mile hike.
• Mink Creek (between Soda Springs and Lava) — a primitive hot spring waterfall accessible via a short trail; GPS coordinates: 42.594, -112.128.

Fatigue Management & Rest Zones

The drive's monotony after Star Valley can induce drowsiness. The rest area in Freedom, Wyoming (mile 65) has picnic tables and toilets. Soda Springs' town park (mile 140) has shaded benches. After 2 hours, consider the Alpine Junction rest stop (restrooms, soda machines). In Lava Hot Springs, the city park near the municipal pool offers a grassy area. The total drive is suitable for a single driver with short breaks; however, splitting driving with a partner enhances safety. Coffee is available at Maverik in Afton (mile 85) and Star Valley Coffee. Avoid driving from 1-3 PM when drowsiness peaks.

Fueling up in Jackson is wise — gas stations are sparse after Alpine Junction. The average fuel economy for an SUV yields about 10 gallons consumed for the 180-mile route (roughly 18 mpg). At Wyoming/Idaho prices (around $4.00/gallon as of 2025), expect fuel costs of approximately $40 for the entire trip. Diesel vehicles may find stations in Alpine and Soda Springs. The road is two lanes throughout except for short passing lanes near Star Valley. Cellular coverage is spotty from US-89 through the Caribou National Forest; download offline maps in Jackson. Lava Hot Springs offers EV charging at a Level 2 station at the Lava Hot Springs Inn. The route follows US-89 (Star Valley Highway) then ID-34 (a scenic two-lane with 55 mph limits). Snow and ice are common November to April; carry chains. Seasonal closures are rare but check road conditions via Idaho 511. Parking at Lava Hot Springs is plentiful; the municipal pool lot charges $5/day. Facilities include restrooms, picnic areas, and wheelchair-accessible paths.

Natural Landscapes & Attractions

The most dramatic scenery occurs in the first 20 miles south of Jackson: the Snake River Canyon. Sheer limestone cliffs drop to the river below; pullouts at Hoback Junction offer views of the Hoback River confluence. Further north, the Star Valley is a wide agricultural basin with the Salt River Range to the west and the Caribou Range to the east.

• Palisades Reservoir (mile 55) — turquoise water backed by snow-crusted peaks; boat ramps and fishing piers.
• Gray's Lake National Wildlife Refuge (mile 90) — spring and fall thousands of sandhill cranes congregate; boardwalks and viewing blinds.
• Lava Hot Springs — five geothermal pools ranging 102-112°F; the natural rock basin in the Portneuf River offers free soaking spots.

Fuel and Route Economics

Gas costs are lower in Wyoming than Idaho; fill up in Jackson before crossing the state line. The cheapest fuel station on route is often the Sinclair in Alpine ($3.80/gal typical). Using cruise control on long straightaways near Soda Springs maximizes mpg. An intermediate stop at Soda Springs adds 15 minutes but offers the cheapest gas in Idaho. Road trip snacks: stock up at Jackson's Albertsons, as only convenience stores exist beyond.

UNESCO World Heritage Sites

While the route itself contains no UNESCO sites, nearby Yellowstone National Park (a UNESCO World Heritage Site) is just 90 minutes north of Jackson. The park's geothermal features and wildlife are an optional detour for those with extra time. Yellowstone's thermal basins share geological origins with Lava Hot Springs (both part of the Yellowstone Hotspot).

Climatic Conditions & Route Aesthetics

Seasonal beauty varies dramatically:

• Fall (Sept-Oct): Aspens gold near Alpine, clear skies, 50-70°F.
• Winter (Dec-Feb): Snow-covered valleys, temperatures 10-30°F; hot springs steam invitingly.
• Spring (Apr-May): Wildflowers bloom on hillsides, rivers high, 40-60°F.
• Summer (Jun-Aug): Peak crowds, thunderstorm afternoons, 70-85°F; haze from forest fires possible.

Culinary Infrastructure

Food stops are limited. Star Valley has several family diners: in Afton, the Star Valley Coffee & Cafe serves homemade pies and burgers (open 6am-3pm). For fine dining, Jackson is the best bet; options include The Blue Lion (New American) and Snake River Grill (steakhouse). Along the route, packed lunch is recommended. Lava Hot Springs offers small eateries like The Magic Lantern (hamburgers) and Pizzeria Portneuf (wood-fired pizza). For groceries, Jackson's Whole Foods and Albertsons are the last large stores until Lava.

Local Commerce & Culture

Two notable towns: Soda Springs, home to the world’s only captive geyser (the Soda Springs Geyser, erupting every hour) and a historic downtown with soda water fountains. Lava Hot Springs has an old-fashioned Main Street with artisan shops selling locally-made soaps and jewelry. The Lava Hot Springs Foundation operates the municipal pools and hosts a Jazz & Blues Festival in August. In Afton, the world’s largest elk antler arch (spanning Main Street) is a photo stop. Local commerce is tourism-driven, with a strong Western ranching heritage visible in rodeos and farm stands.