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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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Boulder CHAOS (Colorado Hiking And Outdoor Society)

Recent Meetups

  • November 26 · 9:30 AM

    Walker Ranch Hike

    6 Members

    The Walker Ranch loop is a hike that offers something for everyone: a waterfall, beautiful meadows, scenic views of the city and snow capped peaks, challenging inclines,... Learn more

  • November 20 · 9:00 AM

    Sunday Morning at Sanitas

    5 Members

    Sanitas is generally rated moderate strenuous. It's a great cardio burn for those who are getting acclimated or want a good work out. Meet on the north/hospital side of... Learn more

  • November 13 · 3:30 PM

    Full Moon Hike from NCAR

    20 Members | 5.00 | 9 Photos

    We'll hike up Dinosaur Mountain (a.k.a. the Mallory Cave Trail). It's about two hours round trip.  This hike is short but steep. Moonrise will be at 4:38pm. Sunset will... Learn more

  • November 12 · 6:30 PM

    Gnome Roam (a pub crawl) in Gnomvember in Boulder

    4 Members

    Starts at 6:30 (come at 6 if you need a beard). Who wants to be part of a new event? So if santa’s and zombies can have a pub crawl why not gnomes? The Gnome Roam is an... Learn more

  • November 12 · 8:30 AM

    Easy Rock Climb: 3rd Flatiron

    2 Members

    This is kinda last minute, but since the weather is still great I'd like to do another climb of the 3rd Flatiron. Just the standard route, which is about 6 pitches long... Learn more

  • See all past Meetups

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Founded Oct 16, 2011

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