Natural pools along Ponderosa Pine Byway

About

The Ponderosa Pine Scenic Byway stretches through central Idaho's forested mountains, following the South Fork of the Payette River between Boise and Stanley. Along this route, travelers discover some of Idaho's most beloved natural hot spring pools, where geothermal water bubbles up through rock and cascades into soaking pools overlooking the river.

Kirkham Hot Springs is the byway's signature stop. Here, hot spring waterfalls pour down a rocky cliffside into a series of natural pools perched above the riverbank. The steaming water mixes with cool river spray, and the setting is genuinely dramatic. Visitors can soak while watching the Payette River rush past below. Midweek visits tend to be quieter, as weekends draw crowds year-round.

The byway itself is a paved, two-lane highway that makes for an outstanding scenic drive. You don't need to leave the car to enjoy towering ponderosa pines, granite canyon walls, and river views around every bend. The route connects with the Wildlife Canyon Scenic Byway and the Payette River Scenic Byway, forming a popular loop drive that starts and ends near Boise.

Small towns along the way offer food, gas, and lodging. Lowman is a good midpoint stop. In summer, the area is popular for camping, fishing, and rafting. Winter brings snow-covered forests and the unique experience of soaking in hot pools while snowflakes fall around you.

The drive from Boise takes roughly 90 minutes to reach Kirkham Hot Springs. Highway 21 is maintained year-round, though winter conditions can require chains or four-wheel drive. There's no entrance fee for the hot springs, though a Northwest Forest Pass or day-use fee may apply at some parking areas along the route.

Whether you're passing through on a day trip or spending a weekend exploring, the Ponderosa Pine Byway offers one of Idaho's most rewarding combinations of scenic driving and natural soaking.

Accessibility

Accessibility along the Ponderosa Pine Scenic Byway varies significantly by location, and visitors with mobility challenges should plan carefully.

The byway itself is a fully paved highway, making it an excellent scenic drive accessible from any vehicle. Pullouts along the route provide opportunities to enjoy mountain and river views without leaving your car.

Kirkham Hot Springs presents real accessibility barriers. Reaching the soaking pools requires descending a steep, uneven staircase carved into the hillside. The terrain around the pools is rocky and uneven, with no paved paths or handrails in most areas. Wheelchair access to the pools is not currently available. The parking area is a gravel lot off Highway 21 without designated accessible spaces.

Restroom facilities at Kirkham are vault-style pit toilets. Their accessibility features are limited and may not meet current ADA standards.

For visitors who want hot spring soaking with better accessibility, nearby developed facilities in the Boise National Forest area may offer improved access. Some commercial hot spring resorts in the broader region provide ADA-compliant pools, lifts, and facilities.

The byway passes through small communities where services including accessible restrooms and dining can be found. Boise, as the starting point, has full accessible services and lodging.

Contact the Boise National Forest Ranger District at (208) 373-4100 for current accessibility details at specific trailheads, campgrounds, and hot spring sites along the byway. Conditions can change seasonally, and some facilities may receive accessibility upgrades over time.

More accessible places in Idaho

• Discovery Center of Idaho (Boise)
• Museum of Idaho (Idaho Falls)
• World Center for Birds of Prey (Boise)
• Coeur d’Alene Resort Golf Course (Hayden)
• Idaho Falls Zoo at Tautphaus Park (Idaho Falls)
• Japanese-American WWII history (Minidoka National Historic Site)