ENTER TO WIN A FREE REGISTRATION TO THE MASTODON CHALLENGE! The City of Cohoes will hold the 5th Annual “Mastodon Challenge” 15K Race and 5K Run/Walk - the race course continues to show off the best of Cohoes, highlighting the history, culture and community feel of Cohoes. Event is May 7th at Craner Park, North Mohawk St. in Cohoes.