Register today for the first-ever Fall Color Trail Run/Hike from Oct. 10-17 at the Arb. Runners, hikers and walkers can choose their own outdoor adventure, picking the day, time and Arboretum trail length (1k, 5k or 10k) that’s right for them. In addition to enjoying beautiful fall colors, participants will get an Arb water bottle and seamless moisture-wicking bandana. The race format is designed to encourage physical distancing.