45th Annual
Gothic to Crested Butte Run, Walk or Crawl 1/3rd Marathon

Enjoy a Crested Butte July 4th tradition, a favorite of locals and visitors alike.  This fun run benefits RMBL and winds through aspen woods and meadows to end in downtown Crested Butte right before the big parade.

Learn more and register online today!

New! Weldon & Rosalie Weekley Visitor's Center in Gothic

Now open to the public! FREE daily tours of RMBL at 11 a.m. from June through September - come find out about our science, our education, and our history today! Everyone welcome at the Grand Opening Celebration on June 27 from 4:30 to 6 p.m.

Learn more...

2013 Geek Week Hike from Aspen to Gothic with RMBL & ACES

Join RMBL scientists and Aspen Center for Environmental Studies staff on the most famous hike in Colorado as you've never experienced it before! (Photo of West Maroon Pass by Dave Larson)

Learn more about Geek Week and see the schedule of events...

Kids Nature Camp

Registration is open for summer 2013 Kids Nature Camp!

Come and explore the forests, meadows, and mountains of RMBL this summer. Starting June 10 through August 16, children ages 4 - 12 learn about the science and ecology of our spectacular mountain setting.  Science is fun!

Learn more...

Adult Science Tours

Join RMBL every Thursday during the summer for programs that delve into the research and science that take place in Gothic.  Tours are held every Thursday from June 20 to August 15. Cost is $40 per adult and includes lunch.  See a listing of weekly topics HERE. 

Register today!