The 20th Annual Rattlesnake Ramble is coming back to Eldo! This trail running event is a fund raiser hosted by the Action Committee for Eldorado (ACE) who helps manage fixed hardware applications, as well as donates money to the park for trail maintenance and climbing anchor replacement! 100% of the funds raised will be donated to ACE, Rocky Mountain Rescue Group (a wilderness Search and Rescue organization), and the BCC! Challenge yourself on the 4.25 mile course and raise funds for these great organizations!