A simian sprint in which participants were encouraged to dress like apes? Only in our animal-lovin' urban jungle. For a $150 registration fee, participants in the Denver Gorilla Run received their own gorilla suit and the chance to roam five miles through the heart of downtown Denver. Climbing high-rises was optional, but for hairy fun, this was the one. All proceeds from the run went to the Mountain Gorilla Conservation Fund. The second edition -- with a sliding fee scale -- is set to escape on October 22. Start stocking up on bananas: This race has appeal.