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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Seven Mile Bridge
Last Updated: January 2026
Distance
13.9 mi
Elevation Gain
500 ft
Est. Time
6-8 hours
Route Type
One-way
Dogs Allowed
No
Best Season
Summer and early fall (July–September)
Overview
About This Trail
13.9 miles one-way through open valleys with a relatively flat grade. Endurance is the name of the game, and wildlife presence keeps you alert. Prepare with bear spray, water, and a planned shuttle or two-car system to complete the route safely.
Highlights
Difficulty Level
Moderate
Trail Highlights
Open valleys with wildlife sightings in a long-distance hike; early light yields better wildlife photography and solitude
Insider Tips
• Start before sunrise to catch wildlife and avoid heat • Carry bear spray and know how to deploy • Trekking poles help at river crossings and stability • Filter water from creeks; carry extra water • Coordinate a shuttle or two-car plan for the one-way hike
Best Season to Hike
Summer and early fall (July–September)
Hiking Tips
- Carry 2 liters water minimum
- Bear spray and bear-safety knowledge required in bear country
- Start early, pace steady; shade is limited in open valleys
- Filter creek water and plan a shuttle/two-car drop-off for the one-way hike
Family Info
Not recommended for young children due to bear country and potential river crossings
What Hikers Say
A long, relatively flat one-way route with abundant wildlife opportunities and constant bear awareness. Endurance is the core requirement, with limited cell service adding to the challenge. Proper planning for permits and a shuttle is critical for a safe through-hike.
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ℹ️ Data Sources
National Park Service — Seven Mile Bridge (official page) (checked 2026-01-08) National Park Service — Yellowstone National Park fees, hours & conditions (checked 2026-07-05) Google Reviews YourNPGuide Editorial
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