Whistler Half Marathon 21K
Always held the first Saturday in June.
Overview
A trail running experience through Lost Lake Park in Whistler, BC, with distance options from a 5K to a 32K, all run on mostly non-technical gravel and paved valley trails through temperate rainforest, along the lake and river, in the shadow of glacier-capped mountains.
Course
75% smooth, non-technical gravel trail (1.5-5m wide) through Lost Lake Park, with the remainder on paved valley trail.
Cutoff Details
Mons Rd: 3.5hr / 11:25 AM. Finish: 4.5hr / 12:25 PM.
Aid Stations
6 aid stations at 2.3, 8, 9.6, 14, 16.3, and 18.6 km, stocked with water and Näak Boost drink mix throughout, plus Coke, bananas, oranges, chips, and gel at select stations.
Getting There
Driving Directions
Whistler Olympic Plaza, Whistler, BC.
Requirements
Recommended minimum age 16 on race day. Walkers must start in the designated walking wave (first wave of the event).
Policies
Land Acknowledgement
Held on the unceded and shared territory of the Sḍx̱wú7mesh (Squamish) Nation and Lil'wat Nation.
About Coast Mountain Trail Series
Coast Mountain Trail Running (CMTR) produces some of British Columbia’s most beloved and challenging trail races. Founded by Gary Robbins and Geoff Langford, CMTR blends rugged coastal terrain with top-tier race organization, fostering a deeply loyal community of trail runners across all ability levels. Their events range from winter snowshoe and multisport races to legendary ultras like the Squamish 50 and Diez Vista 50K.
Each race reflects CMTR’s commitment to sustainability, inclusivity, and community stewardship. They operate as a carbon-neutral company (aiming to go carbon-negative), donate $5–$10 per race entry to local search and rescue and trail organizations, and plant one tree per runner through an Indigenous-led reforestation partnership. To date, they’ve donated over $465,000 and planted more than 16,000 trees.
From technical alpine climbs to beginner-friendly non-technical trail half marathons, CMTR’s event calendar offers something for everyone. With an energetic volunteer crew, thoughtfully marked courses, and a commitment to local impact, these races are more than just events, they’re celebrations of community and the wild beauty of BC’s backcountry.
Disclaimer
We make every effort to provide accurate and up-to-date information on Kåduka, but details may change. Please always confirm the latest information on the official race website. See something that needs correcting? Send us a note at [email protected]
