Yellow-bellied marmot
Marmota flaviventris
MorningMiddayAfternoon
Summit talus colony — most active May through September. Their whistle alarm is the soundtrack of the upper ridge.
Photo: USFWS — public domain
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Boulder · Hard
Bear Peak
Boulder OSMP's high point — 8,461 ft via West Ridge or Fern Canyon
Boulder Open Space & Mountain Parks
Distance5.5mi round trip
Elevation2,850ft gain
High point8,461ft summit
Typical time3–6hours
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Boulder OSMP's high point — 8,461 ft via West Ridge or Fern Canyon. Editorial intro forthcoming.
Trip facts
Typical duration3–6hours
Trailhead5,760ft elevation
High point8,461ft summit
Dogs: leashes required.
How you'll find it
From Chautauqua Park, take Chautauqua Trail to Bluebell-Baird Trail south, then Fern Canyon Trail to Bear Peak West Ridge. Alternatively take Mesa Trail south from Chautauqua.
Drive time
Personalize with your ZIP
We'll calculate drive time + a leave-by recommendation to beat the lot fill.
What you'll get
- 8,461ft summit with 360-degree views from Longs Peak to Pikes Peak
- Rocky technical summit requires scrambling for the final push
- Most demanding trail accessible directly from Boulder city limits
- Connects to South Boulder Peak for a challenging ridge traverse
What locals know
Practical-craft notes for this specific trail — timing, route, photo, etiquette.
Trail tips
- Timing
Pre-dawn start, off-mountain by 1pm
2,850ft of gain to 8,461ft puts you above treeline for the final summit push. Afternoon storms build fast; turn around if you're not at the summit by 11am in summer.
- Route
Fern Canyon → West Ridge is the standard line
From Chautauqua, take Bluebell-Baird south, then Fern Canyon Trail up the steep gully to the West Ridge. The Mesa Trail approach is longer; West Ridge is steeper but more direct.
- Gear
Scrambling shoes for the summit block
Final 100ft to the true summit is class-2/3 scrambling. Trail-runners slip on the smooth granite; approach shoes or a sticky sole make this safer. Helmet not required but reasonable if you're nervous.
- Food
Real lunch on the summit, not snacks
5.5 miles + 2,850ft burns through gels fast. Pack a proper sandwich + fruit + something salty. The summit views (Longs Peak to Pikes Peak) deserve a sit-down meal.
- Water
2L+ summer; no resupply on route
There's no creek on the West Ridge approach. In July–August, 3 liters isn't excessive — the south-facing climb cooks in afternoon sun.
Where you'll start
Bear Peak is a full-day summit from the busy Chautauqua trailhead — the lot fills by 6am on summer weekends, so the move is the free Chautauqua Express shuttle from downtown Boulder if you're coming up after dawn. No overnight stays (OSMP closes at sunset), so the 3–6 hour day needs to start early enough to be off the mountain by lots-closure.
Parking cost
Free
Overnight
Not allowed
Boulder OSMP closes Chautauqua Park lots at sunset — overnight parking not permitted.
Park entrance
Free
Restrooms
Flush toilets
Fills by
6am–7am May–October — extremely competitive
Cell service
Reliable
What's at the trailhead
- Restrooms — Flush toilets
- Water spigot
- Information kiosk
- Reliable cell service
If the lot is full
Free Chautauqua Express shuttle from downtown Boulder Transit Center, Saturdays & Sundays May–October.
Alternative access
- Chautauqua Express shuttle from downtown Boulder (free, weekends May–Oct)
- RTD HOP bus stops at 9th & Baseline
Vehicle security
Moderate break-in risk reported — stash valuables out of sight before arriving.
When to go
Highlighted months offer the best conditions.
Who shares the trail
The Bear Peak ridge tops out at 8,461ft — above most mountain-lion activity but right in marmot and pika territory at the summit talus. Mule deer and elk graze the lower meadows; the rocky summit hosts the highest-elevation Boulder wildlife in summer.
- Occasional
CommonMule deer
Odocoileus hemionus
Year-roundDawnDuskPhoto: NPS Photo — public domain
OccasionalWestern rattlesnake
Crotalus oreganus
MorningAfternoonLower-trail concern (Fern Canyon / Mesa Trail).
Photo: USFWS — public domain
OccasionalBlack bear
Ursus americanus
DawnDuskPhoto: USFWS — public domain
What to watch for
What to watch for
- Rocky scrambling on the summit block — not suitable for casual hikers
- Lightning exposure above treeline on the summit
- Multiple route options — easy to take wrong trail; study route before going
- Steep descent hard on knees — trekking poles strongly recommended
On the map
Overnight camping
Day-use only — overnight not permitted
Day-use only on Boulder OSMP. The summit and ridge are closed at sunset. Closest backcountry for a Bear/South Boulder ridge traverse is Indian Peaks Wilderness (different trailhead entirely).
Trail-tested picks for Bear Peak
Curated for this trail's terrain, elevation, and typical conditions.
More routes from the same lot
Same parking, same logistics — if your plans need to flex, here's what else is reachable from Chautauqua Park Trailhead.
Chautauqua Trail
Easy · 3.2 mi · 780 ft gain · 1.5–3 hours
Boulder's gateway to the Flatirons — 3.2-mi loop from downtown OSMP
Read the guide →Royal Arch
Hard · 3.4 mi · 1,400 ft gain · 2–4 hours
1,400 ft climb to a 7,040 ft sandstone arch — 3.4 mi RT from Chautauqua
Read the guide →South Boulder Peak
Hard · 6.8 mi · 2,950 ft gain · 3.5–6 hours
Boulder OSMP's highest summit at 8,549 ft — 6.8 mi RT via Shadow Canyon
Read the guide →Enchanted Mesa
Easy · 2 mi · 416 ft gain · 1–1.5 hours
Chautauqua's gradual beginner climb toward the Flatirons
Read the guide →
More Colorado trails
South Boulder Peak
Hard · Boulder · 6.8 mi · 2,950 ft gain
Boulder OSMP's highest summit at 8,549 ft — 6.8 mi RT via Shadow Canyon
Read the guide →Royal Arch
Hard · Boulder · 3.4 mi · 1,400 ft gain
1,400 ft climb to a 7,040 ft sandstone arch — 3.4 mi RT from Chautauqua
Read the guide →Chautauqua Trail
Easy · Boulder · 3.2 mi · 780 ft gain
Boulder's gateway to the Flatirons — 3.2-mi loop from downtown OSMP
Read the guide →