Arapahoe Pass and Lake Dorothy Trail

Boulder, Colorado 80303

Arapahoe Pass and Lake Dorothy Trail

Arapahoe Pass and Lake Dorothy Trail Professional Review and Guide

"This moderate and beautiful hike takes you to the Continental Divide by way of the valley created by the North Fork Middle Boulder Creek drainage.

The campground and trail are very popular on weekends, so it is wise to get to the trailhead early. However, most hikers turn around at the Fourth of July Mine or veer off on a trail to Diamond Lake. Permits are required for backcountry overnight stays June 1 through September 15; contact the Boulder Ranger District."

Arapahoe Pass and Lake Dorothy Trail Reviews

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7/11/2009
Great trail but VERY crowded - many more people this time than I've ever seen in the past. Great wildflowers thanks to all the rain. Not much sign of wildlife. We crossed the pass from east to west and went down into the beautiful valley and camped at about 10,800 ft.
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7/1/2007
This is a great trail with spectacular views. A good part of it is above the tree line. If you have dogs, you cross a lot of small streams (which is nice). However, the high part of the trail is also very rocky, which can be very hard on dog's pads, so some dogs might need booties. There is one step missing in the trail instructions. When you hit the fork of the Arapohoe pass trail and the Caribou Lake trail toward the end, you need to take a left on the Caribou Lake trail to then take the small trail to Lake Dorothy.
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Arapahoe Pass and Lake Dorothy Trail Photos

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Trail Information

Boulder
Nearby City
Dog-friendly
Accessibility
6.3
Distance
1,950 feet
Elevation Gain
Out-and-back
Trail Type
5 hours
Duration
Best July to September
Season
10,015 feet
Trailhead Elevation
12,061 feet
Top Elevation
Roosevelt National Forest, Boulder Ranger District
Local Contacts
USGS East Portal, Monarch Lake; Trails Illustrated Indian Peaks, Gold Hill
Local Maps

Activity Feed

Nov 2018