Updated ·
Wild Willy's Hot Springs — Free soaking · donation encouraged in Mammoth Lakes, CA (2026)
Boardwalks lead to heart-shaped soaking pools in Long Valley with panoramic views of the Glass Mountains. Natural caldera heat keeps the water comfortable even during winter storms.
Temperature
95°–103°F
Pools
2 soaking pools
Best season
May-October
Reservations
Walk-up friendly
Dog policy
Leashed dogs welcome
Family policy
Family windows available
Safety notes
- Parking lot fills before sunrise on weekends—arrive early or pick a weekday.
- Do not leave cairns or carve initials into the fragile tufa; fines are enforced.
Amenities & etiquette
FAQ
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