Experienced Guides
Our experienced guides are the best on the river – hands down. No company has more river miles and expertise on the T than the Sierra Mac crew. The Sierra Mac Team of 21 guides collectively have a total of 442 years of navigating whitewater expertise an average of 19 years. You won’t find a crew with more years on the water and better credentials than Sierra Mac. All are exceptional navigators and have advanced certifications in river rescue and wilderness first aid. Sharing their love for rivers and providing a thoroughly enjoyable experience is their number one priority.
Staff biographies
Adam Crom
- SMRT class V trip leader, revered by peers as being the best navigator in the business
- Professional guide since 1982 • Guide Class: V+
- Rivers Navigated: California – Cherry Creek, Tuolumne, Stanislaus, Merced; Elsewhere – Owyhee (Oregon)
- Off-Season Employment: Builder, instrument maker/student
- Home Base: Modesto, California
Daniel Jenkins
- Whitewater Teacher of Beginner to Advanced Raft Guides. Rafting Magazine Team Paddler.
- Professional Raft Guide since 2001 • Guide Class V+
- Hobbies: Rafting Expeditions, Running, Canyoning, Hiking,
- Aerial Tissue, Yoga, Burning Man Chef/Camp Designer.
- Rivers Professionally Navigated: S., M., and N.F. American,
- N. Yuba, N. Mokelumne, Tuolumne, Cherry Creek, N.+ M.F. Kern, Kaweah.
- Outside CA: Rogue, New, Gauley, Middle Fork Salmon.
- Tully in Australia, Chico in Philippines.
- Self Navigated River: 50+ Rivers around California alone;
- Plus Rivers in: Oregon, Idaho, Nevada, Colorado, Montana,
- West Virginia, Pennsylvania, Virginia, Tennessee, Kentucky,
- North Carolina and Georgia. Plus Canada, Philippines, Costa Rica and New Zealand.
- Off-Season Employment: Senior Class V Guide on Shooter and Kawarau – Mother Earth Wanderer
- Home Base: Sierra-Nevada Mountains of California. On Some river 150+ days a year.
Tom Mac
Owner – Lead Guide
- Ultimate Frisbee, Skiing, Surfing, Social Media Manager
- Professional guide since 2004 • Guide Class: V+
- Rivers Professionally Navigated: California – Cherry Creek, Tuolumne, Merced, Kings; Elsewhere – Rio Azul, Futaleufú (Chile); Pecuare, Sevengre, Coto Brus (Costa Rica); Grand Canyon of the Colorado (Arizona), Zambezi (Zambia)
- Off-Season Employment: Sierra Mac R+D, Lillaskog Lodge
- Home Base: Colfax Spring, CA
Zach Rowland
- Just a regular, everyday, normal native hustler.
- Guide since 2009 Float-V
- Professionally worked in Arizona, Colorado, California, Florida, Montana, Utah and West Virginia.
- Off season- always finds a good balance of work (construction, firefighting, manatee tours) and play (packrafting in South America, canoeing and being tourist and traveling) as well as vehicle repairs.
- Homebase: Helena, MT



















