Seattle Mountaineers Adventure Club

Seattle Mountaineers Adventure Club

Seattle MAC is a year-round outdoor adventure program for youth aged 14-18.

Youth-Driven, Staff-Supported

The Mountaineers Adventure Club (MAC) is a year-round outdoor adventure program for youth ages 14-18. Currently youth from more than 15 high schools - from Lake Stevens to West Seattle  to Bainbridge - make up MAC. Members meet monthly to plan outings and learn skills needed to participate. 

Note: MAC membership is $1,800  annually for students joining in the fall. Students joining in the winter will be prorated. Members will have the option of paying up front or paying the annual fee in a series of installments. This is an annual club.

Typical Outings

The youth members plan all of their outings, with guidance from adult advisers. From single-day outings to week-long camping trips, activities include rock climbing, whitewater rafting, hiking, car and snow-cave camping, cross-country skiing, and mountaineering. While attendance at all meetings is not required, the more meetings and outings attended, the more rewarding the program!

MAC Calendar

The highlight of the year for many students is the 10-day long "Summer Trip", featuring alpine & multi-pitch climbing, mountaineering, cragging, hiking, backpacking, rafting, and great times in camp with lots of friends. Check out the photo album below of some of the highlights from 2019's summer trip!

North Cascades 2019

Ready to Join MAC?

In order to build a cohesive community, MAC registration is available only in September and January. Note: Youth must turn 14 years old by January of the school year in which they join to be eligible.

First - Sign up for the New Member Meeting  on September 16. Parents and students should plan to attend the New Member Meeting, as we will pull parents aside for a meeting to answer any lingering questions and help you understand the program while the students get to know each other.

Register for the  New Member Meeting

Next, please take our new member survey which will help staff learn what members are interested in. The survey will answer some of your preliminary questions and give you an idea of what to expect from the club. We're looking forward to a great season!


I'm 100% Sure I want to register for MAC this Fall

Great! Then let's go ahead and get started.

First - sign up for a Family Membership with us (here's a FAQ). 

Next - register for the new member meeting and take the new member survey.

Later - After you've been to the new member meeting and filled out the survey, register here (link will be updated when new course becomes available)!

Our Mountaineers Adventure Club is open to all youth aged 14 and over, and we welcome new members in September and January (youth must turn 14  by January of the school year in which they join to be eligible).  

Email MAC manager, Carl Marrs ( with questions or for more information.

PLEASE NOTE:  MAC membership is $1,800 in total for the year. All members will pay the 1st quarterly installment of annual dues upon registering for the course. Members may then choose to pay the balance remaining in quarterly installments or all at once.

Participants must enroll online. Payment is due by the 10th of the final month of each quarter (December, March, June). Because MAC is a year-round program, Participants can only enroll in September (by October 1) and January (by February 1). See payment forms for cancellation policy details.