Activity Notes

Join us for a 3-day climb of Middle Sister with a beautiful approach from the Obsidian Trailhead!  Friday, 8/12: Hike in to basecamp at Arrowhead Lake, about 2,100' gain over 6 miles.  Saturday 8/13: Summit day, about 3,100' of gain. From camp, expect a steady uphill climb on a moderate snow slope.  We will rope up to cross the Renfrew glacier. The final summit push will likely be loose scree.  We will descent and spend Saturday night back at basecamp at Arrowhead Lake. Sunday 8/14: We will hike out (with optional side trip to Obsidian Falls) and drive home.

Registration is Closed

We’re sorry to report that registration is now closed for this activity and we are no longer accepting applications. The activity has either reached its maximum capacity or the registration period has ended.
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Group Information
Groups Climb Leaders

WE‘RE HERE TO HELP

Have questions about registration or your application status?

Email help@mazamas.org or call (503) 227-2345