Next Meetup

Arapahoe Pass and Lake Dorothy (IPWA)
Arapahoe Pass and Lake Dorothy is a 7.1 mile out and back trail with 1900 feet of elevation gain in continental divide. This may be a snowshoe trip depending on the conditions. Start Elevation: 10100’ End Elevation: 12000’ Skill Level: Strenuous Carpool location: Boulder County Justice Center, Coordinates: 40°00'52.8"N 105°17'12.4"W Trailhead location: Fourth of July Trailhead, Coordinates: 39°59'42.5"N 105°38'03.4"W This hike is for the fit and acclimated. Meet at 7:00am at Boulder County Justice Center to organize carpool. If you are driving to trailhead by yourself, meet us at 8:00am at Fourth of July trailhead. We will start hiking promptly at 8am so don't be late. Make sure to bring water, snacks, warm layers and micro-spikes. Bad weather postpones/cancels. Disclaimer: By attending this hike, you assume all responsibility for your own safety. Mountaineering in Colorado can be very dangerous. Altitude sickness, dehydration, and fast-building storms are the most common problems. Please be in shape and self-sufficient.

Boulder County Justice Center Parking Lot

1777 6th Street · Boulder, CO


What we're about

CHAOS is an informal, Boulder-based group of energetic, fun, non-competitive, backcountry enthusiasts who are in their 20s, 30s, or 40s who enjoy self-powered and self-organized activities including hiking, backpacking, biking, snow shoeing, skiing, mountaineering, and river sports.

CHAOS' main Goal is to be a community through which one can make life-long friendships, share backcountry trips, expand outdoor and leadership skills, appreciate nature and enjoy the sense of community, teamwork, and challenge that prospers in backcountry situations.

As a member you will be able to check activities on this website, and post your own trips/events. Note that all trips should be for CHAOS by CHAOS, outdoors, and self powered.

CHAOS actively encourages its members to organize trips but does not supervise the activities. CHAOS is not a guide service and a person should only go on trips they feel are appropriate for their ability and experience level.

If you have questions, ask the trip organizer! Many trip organizers love to help out new members and will gladly answer any questions you have about the trip, what equipment to bring, etc. Above all else, have fun and be safe!

Here is a Welcome To Chaos document with more information:

Many past and present members believe that CHAOS enormously improved their "young adulthood and pre-family" phase of life. To ensure that this wonderful opportunity remains for future members, they should be in their 20's, 30's or 40's when they join CHAOS.

If the members’ ages or the group’s style don’t feel like a good fit for you, we suggest you check out one of the other great clubs in Boulder like the Flatirons Ski Club, the Boulder Outdoor Group, the Colorado Mountain Club, the Boulder Nordic Ski Club, the Sierra Club, or the C.U. Hiking Club (office in UMC).

Please be respectful when you RSVP to events, and only RSVP if you know you will make the event; especially if there is a limited number of spots available. If you end up with three no-shows; whether it's a no call/no show, or a cancel at the last minute; you will be removed from the group.

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