With RMI
Marissa grew up in Issaquah, Washington, where she developed a love for the outdoors at a young age. She later moved to Salt Lake City to attend the University of Utah, where she is currently pursuing a degree in electrical engineering.
She spends her winters skiing in the Wasatch Mountains and her summers back in Washington. She enjoys climbing, hiking, running, and spending time with friends outside. She has also spent some time competing in freeride competitions, and skiing continues to be a big part of her life.
Multiple | Mt. Rainier, Washington, USA | 14,410' (Disappointment Cleaver)
Multiple | Mt. Baker, Washington, USA | 10,786' (Easton Glacier ski descent)
1 | Grand Teton, Wyoming, USA | 13,775' (Owen-Spalding)
1 | Eldorado Peak, Washington, USA | 8,868'
1 | Mt. Hood, Oregon, USA | 11,249'
1 | Glacier Peak, Washington, USA | 10,541'
1 | Mt. Adams, Washington, USA | 12,281'
RMI Expeditions Guides are required to hold a number of certifications, but many go above and beyond with their technical and outdoor training. We actively encourage (and provide funding for) our guides' continuing education.
AIARE 1
November 2, 2025
Program Name
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Mountaineering
The Five Day Rainier Climb offers the classic Mount Rainier experience with added time, margin, and flexibility built into the schedule, allowing teams to move deliberately, adapt to conditions, and fully engage with the mountain rather than rushing to meet a narrow summit window. That extra day provides the flexibility to choose the best timing for summit day (especially valuable when weather is less predictable) making it ideal for first-time Rainier climbers and anyone seeking a deeper immersion in one of North America's most iconic glaciated peaks.
The climb begins with a half day orientation at BaseCamp, then a full day of mountaineering school on the mountain, then spends two nights at Camp Muir in the private hut RMI uses — the only guide service with its own shelter there, giving climbers time to acclimatize, refine movement skills, and recover between efforts. Throughout, you climb in small rope teams at a 2:1 climber-to-guide ratio for closer instruction and more individual attention. Before and after the climb, your team is based at Rainier BaseCamp in Ashford, home to the BaseCamp Bar & Grill, Whittaker Mountaineering, and Whittaker's Bunkhouse.
November 2, 2025
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Leadership
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