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Boulder, CO: Arapahoe Glacier TrailBackpacker Magazine

From coniferous forests to intimate alpine lakes to views of the Continental Divide, this 12-miler offers classic Rocky Mountain scenery.

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Author: Backpacker Magazine
Activity: Hiking
State: Colorado (CO)
Distance: 11.55 mi 
Difficulty: 5 / 10
USGS Topo Map: Ward, Monarch Lake
Rating: Unrated  
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A strenuous trek into the heart of Indian Peaks Wilderness, the Arapahoe Glacier Trail is a 6-mile-long sustained climb through spruce and pine stands and mountaintop tundra that culminates with a 12,800-foot-high lookout next to the Continental Divide.

The first half of this heart-pounder is a shady, tree-covered journey with occasional views of Boulder County’s forested mountains. After climbing nearly 2,000 feet over 3 miles, 360-degree views reward the weary traveler. The deep blue waters of Island and Silver lakes lap up against Arapahoe Moraine’s green slopes. Goose Lake and its headwaters reach the base of the Continental Divide. Continue up rounded mountains on crushed granite singletrack. The trail switchbacks to a 12,000-foot saddle where hikers can enjoy 100-mile views of the Rockies. Follow the increasingly rocky trail for another 2 miles to Arapahoe Glacier Lookout, then retraces steps back to the trailhead.

-Mapped by MacKenzie Ryan and Chelise Simmons

TO TRAILHEAD: From downtown Boulder: Head northwest on Broadway Street/CO-93. Turn left onto Canyon Road. Continue for 14.6 miles. Turn right onto Hurricane Hill Drive. Make a slight left onto Ridge Road. Turn right onto Peak to Peak Highway/CO-72. Continue north and turn left at the sign for the University of Colorado's Mountain Research Center. Bear left at the fork in the dirt road and follow it past Rainbow Lakes Campground. Parking for Rainbow Lakes and Glacier Rim Trailheads is immediately after the campground on the right side of the road.

DIRECTIONS + WAYPOINTS: helping you find your way

Position Format: Datum:
Tracks

Arapahoe Glacier Trail

Distance: 11.55 mi Points: 413
Total Time: none Speed: 0.0 mph Pace: 0:00 / mi
Active Time: none Speed: 0.0 mph Pace: 0:00 / mi

Points of Interest

AGT001

Location: 40.010656, -105.571489
Glacier Rim Trailhead: Bear right onto Arapahoe Glacier Trail.

AGT002

Location: 40.016934, -105.571060
On the left side of the trail, a break in the trees reveals a sweeping panorama of Boulder County and the surrounding mountains.

AGT003

Location: 40.023283, -105.586486
After switchbacking uphill for a short distance, the trail begins to climb up a steep grade.

AGT004

Location: 40.022973, -105.592894
After hiking a few miles through pine and spruce cover, the trail reaches wide open space. From here, the thin, crushed granite singletrack travels west toward a series of long switchbacks.

AGT005

Location: 40.022995, -105.597496
Pass Goose and Silver lakes on the right. Continue east for a short distance, then turn up the mountain.

AGT006

Location: 40.014494, -105.614152
After following the switchbacks along the north face of the first mountain, reach a saddle with 360-degree views. West of this point, the Continental Divide stretches north to south. Eldora Ski Resort and Bald Mountain are directly south. Boulder and Denver are to the far east. After marveling at this scene, follow the ridgeline trail over a rocky, crushed granite trail.

AGT007

Location: 40.015783, -105.643888
Arapahoe Glacier Lookout: The Arapahoe Peaks form a bowl to the left. To continue further, bear left and continue 3 miles to Arapahoe Pass. To turn back, retrace steps back to Glacier Rim Trailhead.

Glacier Rim Trailhead

Location: 40.010721, -105.571060
©MacKenzie Ryan

Boulder County and the surrounding mountains

Location: 40.016802, -105.570803
©MacKenzie Ryan

Views to the South

Location: 40.020779, -105.579214
©MacKenzie Ryan

Fallen Trees

Location: 40.021108, -105.576468
©MacKenzie Ryan

Breaking through the tree cover

Location: 40.022685, -105.585566
©MacKenzie Ryan

Above Treeline

Location: 40.022619, -105.590630
©MacKenzie Ryan

Island and Silver Lakes

Location: 40.023079, -105.588312
©MacKenzie Ryan

Goose Lake and its headwaters

Location: 40.017952, -105.607967
©MacKenzie Ryan

Trail up the mountain

Location: 40.021075, -105.597754
©MacKenzie Ryan

The Saddle

Location: 40.015257, -105.612259
©MacKenzie Ryan

Eagle soaring past the saddle

Location: 40.013548, -105.625649
©MacKenzie Ryan

En route to the lookout

Location: 40.013548, -105.636377
©MacKenzie Ryan

Easternmost mountain at Arapahoe Glacier Lookout

Location: 40.015060, -105.642772
©MacKenzie Ryan

South Arapahoe Peak

Location: 40.015685, -105.643673
©MacKenzie Ryan

North Arapahoe Peak

Location: 40.015422, -105.643287



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