TrailAvalanche Peak Trailhead 5N2
4.5-mile out-and-back; 2,100 ft gain. Relentless climb with a true summit payoff.

This trail climbs a burned hill with views, passes through spruce-fir forest, and reaches Lone Star Geyser. It's moderately easy—doable for most hikers but requires steady effort over 6.3 miles. You'll experience regrowth forest and a working geyser, then return the same way. Bear awareness is mandatory.
Moderately easy
Ascend a burned hillside with panoramic views across the Upper Geyser Basin, traverse spruce-fir forest, and reach the active Lone Star Geyser.
• The burned area is regrowth forest from the 1988 fires—surprisingly scenic and photogenic. • Old Faithful lots fill early in summer; arrive by 7 AM or plan a mid-afternoon start (after 2 PM). • Lone Star Geyser eruptions are unpredictable—check forecasts with the ranger station before committing your hike time. • Stay 25 yards from the geyser and all thermal features.
Summer and early fall (June–September), when roads are open and weather is stable.
Moderately easy terrain suits families with school-age children and hiking experience. Constant vigilance for bears required; children must stay on the marked trail. The burned hill is steady climbing without scrambling. Not suitable for very young children or families without trail experience.
Hikers praise the geyser destination and burn-area views, though most underestimate the sun exposure on the open hill. The trail is achievable for moderately fit hikers, but the exposed section demands hydration and sun protection. Most report it's worth the effort.
None required.
No shuttle service. Park at Old Faithful Ranger Station; trailhead is a 0.25-mile walk.
Be aware of bear activity—make noise on the trail. Stay on marked trails at all times, especially near thermal features. The burned hill section has no shade—expect high sun exposure and heat. The descent can be steep and loose.
Rooty and rocky with some loose footing on the burned hill. Steady climbing (no scrambling). Not wheelchair accessible. Hiking poles recommended for stability and knee support on the descent.
Moderately easy terrain suits families with school-age children and hiking experience. Constant vigilance for bears required; children must stay on the marked trail. The burned hill is steady climbing without scrambling. Not suitable for very young children or families without trail experience.
Old Faithful developed area (0.25-mile walk from trailhead) has lodging, dining, visitor center, ranger station, and restrooms.
Hikers praise the geyser destination and burn-area views, though most underestimate the sun exposure on the open hill. The trail is achievable for moderately fit hikers, but the exposed section demands hydration and sun protection. Most report it's worth the effort.
" Hikers praise the geyser destination and burn-area views, though most underestimate the sun exposure on the open hill. The trail is achievable for moderately fit hikers, but the exposed section demands hydration and sun protection. Most report it's worth the effort."
Yes. The moderately easy terrain has no scrambling or technical climbing. Steady pacing for 3–5 hours gets you there. Not for very out-of-shape hikers, but achievable for anyone doing regular exercise.
Yes, but apply bear safety: stay alert, hike loudly, make constant noise. The trail is well-marked and popular. Never approach wildlife.
Good hiking boots, 2+ liters of water, sun protection (hat, sunscreen, long sleeves), and a light layer for shade. Trekking poles ease knee impact on the descent.
3–5 hours round trip depending on pace, fitness, and photo breaks. Most hikers finish in 4 hours. Add time if you wait for a geyser eruption.
Bear activity is present. Attacks are rare if you follow rules: hike loudly, stay alert, and never approach animals. The warning is serious—treat it seriously.
No. Carry all water you need. Thermal springs are boiling hot, and creeks are not safe to drink from.
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