Near Chicago Basin 14er Grand Slam
Sunrise from Windom Peak.
Near Chicago Basin 14er Grand Slam
Sunlight Spire and Windom Peak from Sunlight Peak. The last day of good weather.
Near Chicago Basin 14er Grand Slam
A view from above.
Near Chicago Basin 14er Grand Slam
Hikers stroll into camp with Chicago Basin's Needle Mountains in the background. You wanna go here now, don't you? Chicago Basin Trail
Near Chicago Basin 14er Grand Slam
A hiker navigates the bizarre chimney just below Sunlight Peak's summit.

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Classic Hike Route

Chicago Basin 14er Grand Slam

4.9 (12 Ratings)
An epic day covering all four of Chicago Basin's challenging 14ers.
21
mi
Distance
9,436
ft
Gain
strenuous
Difficulty
Regional Classic
A must do route for the area handpicked by local experts.
Fall ColorsLakeRiver/CreekSwimmingViewsWaterfallWildflowersWildlife
Access Issues
This rxh must be accessed via the Chicago Basin Trail, which is in turn accessed either by train (summer only) or by a long rxh in (Animas River Trail).

Route Details

Flatter
Steeper
21.03mi
Distance
9,436ft
Elevation Gain
9,436ft
Elevation Loss
70%
Max Grade
14,098ft
High Point
8,220ft
Low Point
Path Type
There and Back
Description
From camp off the Chicago Basin Trail, start up Twin Lakes Approach. From here, it's recommended you summit Sunlight and Windom first, as the rock on Sunlight is slightly more technical and prone to getting slippery. It's easier to escape from the Eolus Group should the weather change later in the day. So, climb Sunlight and Windom. Then come back down to the Twin Lakes and climb the Eolus Group next. From here, all that's left is a descent back down Twin Lakes Approach.If you don't want to take the train and want an epic multi-day backpacking experience, start from Purgatory. Starting from Purgatory means you don't need to worry about a train ticket, plus you get some extra mileage out of the deal. For this route, consider at least two nights; hike in and camp the first day, summit all four 14ers on the next day, and hike out the following day. Add in an extra day if you want to enjoy the basin a bit more!

Route Conditions

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Contributors
Tyler Prince