Bunsen Peak Trail

Q: Is this trail safe to do alone?

Not ideal. You're climbing into grizzly country with significant exposure at altitude. Partners provide both safety and communication redundancy. At minimum, file a trip plan.

Q: Do I need special gear?

Trekking poles are strongly recommended, not optional. The descent is steep and loose. Bear spray is essential. Sturdy boots required—no trail runners. Bring a headlamp; start before 6 AM.

Q: What fitness level is required?

You need to be comfortable with sustained uphill over 2+ miles. If you can't do 30 minutes of stairs without stopping, this will hurt. It's not technical, but it's a serious grind.

Q: Will I have enough water?

No sources on the trail. Carry 2-3 liters minimum depending on temperature. High elevation plus exposure equals increased thirst. A typical hiker drinks 1L per hour on this climb.

Q: Is it worth the effort?

Yes, if you want genuine panoramic summit views of northern Yellowstone. The views justify the pain. But you're climbing for views, not a leisurely forest walk.

Q: How crowded will it be?

Busy in summer, especially 7-11 AM. Arriving by 6:30 AM helps. Early fall (late September through October) is quieter. Come expecting company in peak season.

Distance

4.6 mi

Elevation Gain

1,300 ft

Est. Time

2-3 hours official estimate; realistically 3-4 hours for most hikers, 4-5 if building fitness.

Route Type

Out-and-back

Dogs Allowed

Best Season

Summer and Fall

Overview

About This Trail

Bunsen Peak is a 4.6-mile day hike with a serious 1,300-foot elevation gain in Yellowstone's northern section. The trail climbs through forest and meadow via relentless switchbacks to an alpine summit offering panoramic views of Swan Lake Flats, the Gallatin Mountains, Blacktail Deer Plateau, and the Yellowstone River Valley. Grizzly bears frequent this area—noise discipline is mandatory. This is a moderately strenuous ascent; expect 3-4 hours round-trip if you're fit.

Highlights

Difficulty Level

Moderately strenuous—lung-buster

Trail Highlights

Panoramic summit views across northern Yellowstone. 360-degree vistas of Swan Lake Flats, Gallatin Mountains, Blacktail Deer Plateau, and Yellowstone River Valley. Alpine terrain with serious exposure.

Insider Tips

• The false summit at treeline will trick you—the real summit is another 0.3 miles through alpine scrub • Bring bear spray and know how to use it; this is legitimate grizzly habitat • The gravel parking lot is genuinely small; arrive early or accept being turned away • Summer afternoon thunderstorms develop fast at this elevation; summit and descend before 2:00 PM • The ridge descent is steep and loose in places; don't rush

Best Season to Hike

Summer and Fall

Hiking Tips

Tighten your boots hard—2.3 miles of switchbacks will punish loose lacing
Carry minimum 2-3 liters of water; no sources on trail, high elevation increases thirst
Make constant noise (talk, clap); grizzly territory demands audible presence
Trekking poles are mandatory for the 1,300-foot descent; saves your knees and adds stability
Start by 6:00 AM; afternoon thunderstorms develop fast at elevation
Check road status before driving—Grand Loop Road segments close outside mid-April to early November
The summit has an active communications tower; stay clear and stay focused on descent

Family Info

Not recommended for young children. The 1,300-foot elevation gain is serious; switchbacks are relentless. Grizzly bear presence requires constant supervision and noise discipline. Only suitable for fit children (10+) with hiking experience and adult supervision.

What Hikers Say

Hikers praise the summit views and north park panorama, but warn that the elevation gain is brutally steep and the descent is harder than expected. Grizzly bear precautions are essential. Popular and crowded in summer.

Details

Trail Specifications

Distance: 4.6 miles

Elevation Gain: 1,300 ft

Duration: 2-3 hours official estimate; realistically 3-4 hours for most hikers, 4-5 if building fitness.

Difficulty: Moderately strenuous—lung-buster

Route Type: Out-and-back

Surface: Forest floor transitioning to loose scree and talus near summit

Getting There

Trailhead: 5 miles south of Mammoth on the Grand Loop Road. Park in the gravel lot just south of Golden Gate, across from the Glen Creek trailhead.

Parking: Small unpaved gravel lot with limited capacity

Fills Up: Full by 7:30-8:00 AM during peak season (summer)

Requirements

Permit Required

No permits required

Fees: $35 park entrance (private vehicle). No additional trail-specific fee.

Shuttle Available

No shuttle system

Trail Rules

Dogs: No

Biking: No; hiking only

Trail Markers: Well worn and marked

Map/GPS recommended

Trail Features

Conditions & Safety

Water: None on trail; carry all water required

Shade: Mixed. Forest provides shade for the first 1.5 miles; final 1 mile is full sun alpine terrain.

Cell Service: Spotty; rely on park ranger services

Hazards:

Grizzly bears frequent this area—mandatory noise discipline and bear spray. Steep exposure with unprotected terrain. Alpine weather develops fast; afternoon thunderstorms are common. Loose scree on descent is slippery when wet. Lightning risk at high elevation. Steep switchbacks on descent punish tired knees.

Emergency: Nearest ranger station: Mammoth District Ranger Station (5 miles north)

Crowd Info

Typical Crowds: Busy in summer; conga line in peak season mornings

Peak Times: 7:00 AM to 11:00 AM, June through August

Accessibility & Family

Accessibility:

Steep exposed switchbacks, scrambling near summit, loose terrain—not wheelchair or stroller accessible

Family Notes:

Nearby Facilities

Mammoth Campground (5 miles north), Mammoth Visitor Center, lodging and dining at Mammoth area

What Hikers Say

FAQs

Are there bears on this trail?

Yes, grizzlies frequent this area. Carry bear spray, make constant noise (talk, clap, sing), and hike with a partner if possible. Bear bells are insufficient.

Is this trail safe to do alone?

Do I need special gear?

What fitness level is required?

Will I have enough water?

Is it worth the effort?

How crowded will it be?

🏞️ National Park Service 📝 YourNPGuide Editorial

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