Clare is from Englewood, Colorado and studied coral ecology at Princeton University, where she ran cross country and track. She taught English in Southern Thailand, while also establishing a swim and environmental conservation program. Clare began running professionally in 2016 after winning the Leadville 100. She's since won Western States (2019), CCC 101k (2017, UTMB series) and has the Fastest Known Times on the Zion Traverse and Joshua Tree Traverse. She's proud to be sponsored by Patagonia, Petzl, La Sportiva, and Honey Stinger.