TrailAvalanche Peak Trailhead 5N2
4.5-mile out-and-back; 2,100 ft gain. Relentless climb with a true summit payoff.
2,100 ft elev. gain
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Thumb Geyser
Last Updated: January 2026
Distance
0.8 mi
Elevation Gain
50 ft
Est. Time
20–30 minutes for casual exploration; up to 2 hours if you linger
Route Type
Loop
Dogs Allowed
No
Best Season
Late May through mid-October
Overview
About This Trail
Thumb Geyser is a short, wheelchair-friendly loop at West Thumb Geyser Basin. The route stays on a well-maintained boardwalk with minimal elevation change (roughly 50 ft total) and a 20–30 minute casual stroll, though you can linger for longer. Expect thermal features, bear and bison presence nearby, and sun exposure; carry water since there are no sources on the trail.
Highlights
Difficulty Level
Easy Stroll
Trail Highlights
Colorful geothermal pools along a wheelchair-friendly boardwalk with a lake backdrop
Insider Tips
• Hike clockwise for potentially better initial views. • Aim for early morning or late afternoon to avoid crowds and possibly spot wildlife.
Best Season to Hike
Late May through mid-October
Hiking Tips
- Carry at least 2 liters of water.
- Wear waterproof shoes; boardwalk can be slick when wet.
- Wear a hat and sunscreen; sun exposure is common.
- Bring rain gear; weather can shift quickly.
- Traction devices may help in late-season ice.
Family Info
Very safe and suitable for children due to the boardwalk and short distance
What Hikers Say
Hikers praise the geothermal pools and lake backdrop, accessibility, and family-friendly nature. Crowds can be heavy; the path feels like a scenic stroll rather than a backcountry trek.
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ℹ️ Data Sources
getinspiredeveryday.com yellowstonenationalpark.com nps.gov justgotravelstudios.com hikespeak.com yellowstoneparknet.com 10adventures.com wordpress.com justinfague.com visitmt.com hikeramerica.com mybackyardandbeyond.com wanderlog.com getyourguide.com oldfaithfulandfriends.com recreation.gov thetravel.com planyellowstone.com usparkpass.com Current time information in Teton County, US. yellowstonenationalparklodges.com Google Reviews YourNPGuide Editorial
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