A competitor splashes through a swampy section of the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors navigate the Monkey Bars during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor winces as he navigates the Barbed Wire Crawl during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor emerges from the Dunk Wall during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor navigates the Monkey Bars during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Sonya Elias, from Calgary, leaps over the finish line of the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor performs burpees as part of the Atlas Carry obstacle during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors perform the Hercules Hoist during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors perform the Hercules Hoist during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors begin the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor navigates a Z-Wall during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors begin the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor performs the Atlas Carry during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Andrew Chabot, from Indianapolis, leaps over the finish line of the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors perform the Bucket Carry during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor leaps over the finish line of the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors begin the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork. (Casey Kreider/Daily Inter Lake FILE)
Competitors navigate the Monkey Bars during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor winces as he navigates the Barbed Wire Crawl during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor emerges from the Dunk Wall during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor navigates the Monkey Bars during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Sonya Elias, from Calgary, leaps over the finish line of the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor performs burpees as part of the Atlas Carry obstacle during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors perform the Hercules Hoist during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors perform the Hercules Hoist during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors begin the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor navigates a Z-Wall during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors begin the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor performs the Atlas Carry during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Andrew Chabot, from Indianapolis, leaps over the finish line of the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors perform the Bucket Carry during the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
A competitor leaps over the finish line of the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday. (Casey Kreider/Daily Inter Lake)
Competitors begin the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork. (Casey Kreider/Daily Inter Lake FILE)
Photos as competitors navigate the 13-mile Spartan Beast race at Flathead Lake Lodge in Bigfork on Saturday.