Have you been charged by a bison? I have!
I've been running for the past decade, and one location for a number of my races is Antelope Island State Park, in the Great Salt Lake, Utah. The Park hosts the spring Buffalo Run (25K, 50K, 50 mile, 100 mile races), the fall Antelope Island Fall Classic 50K, and the fall Mountain View Trail Half Marathon (13.1 miles).
My fastest times were 1:44:03 (half marathon), 2:38;26 (25K), and 6:14:08 (50K). Finishers win a coffee mug. For the Buffalo Run, if you win your age category, you win a buffalo head nickel. Caroline and I are both professional runners, because we have won money... 5 cents each!