🇺🇸 USA · Gardiner, Montana
♨ Temperature
71°C
⛰ Altitude
1620 m
⚗ pH
—
💧 TDS
—
🌊 Flow rate
—
📅 Established
—
✓ Verified on 2026-07-24
Boiling River is where a powerful hot spring venting at 71°C meets the cold Gardner River just inside Yellowstone's northern boundary, creating a natural mixing zone where visitors can find a sweet spot between scalding and frigid. The 800-metre trail from the parking area follows the river through sage-scented canyon terrain to the confluence. Soakers wedge themselves between boulders where hot and cold currents swirl together. The area closes when spring snowmelt makes it unsafe, but in late summer and fall it draws crowds from nearby Gardiner, Montana.