The Marin Mountain Circuit is a demanding swoop racing locale situated north of Plaxton in the Marin Mountain Range. The demanding course weaves through some two hundred and fifty kilometers of dense forest, craggy granite and shale outcroppings, serpentine riverbed, and even into the treacherous scree and talus of Mount Whakat (Whakatane). Mount Marin, the namesake for the entire range, serves as the start and end point. Team Caslaugn, Caspia's local "pro-am" team, often holds smaller events during the offseason.