Fat Marmot Week 2026

Hosted by the RMBL Marmot Project — one of the world’s longest-running studies of wild mammals — Fat Marmot Week combines real science with a little friendly competition. The largest of the true hibernators, marmots bulk up all summer to survive the winter. This online event is an opportunity to get folks excited about yellow-bellied marmots, one of our favorite alpine residents, and to share the science behind their weight gain.

Meet this year’s contestants beginning July 27, and cast your vote starting Aug. 24.