Denise Klatt of Brookline, Mass., (foreground) leads a pack of runners during the 2024 TARCtic Frozen Yeti. The Frozen Yeti started Klatt’s buildup to ultimately finishing the Hardrock 100 that summer. On Saturday, Dec. 7, Klatt was selected to run the Hardrock 100 once again in 2025. Photo by Chris Wristen/MassUltra.