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Trail Days Sustainable Recreation 2021

Series Sponsors: Inyo National Forest, Town of Mammmoth Lakes, Measure R 

Project Description: 

Trail Days are back for Summer 2021!

The Town of Mammoth Lakes and Inyo National Forest are teaming up once again for the 12th season of Trails Days on the Mammoth Lakes Trail System. We are planning safe and fun ways to get involved as we know you are eager to get back to work with us. With more opportunities than ever you're invited to join the Mammoth Lakes Trail System trail crew and hosts to help with new trail construction, maintenance and stewardship activities all summer long. Sign up online for volunteer shifts one week in advance beginning mid-May. Open shifts kick-off on National Trails Day, Saturday June 5th and will be available Wednesdays and Weekends through September. This summer’s work program promises to be especially rewarding as we’ll be building a number of brand new trails in the Lakes Basin! 


All ages and ability levels are welcome. Children must be supervised by a parent or guardian, and all volunteers must sign a liability waiver prior to beginning work. We will provide all necessary tools and specialized safety gear, but ask participants to arrive with personal protective equipment (masks, gloves, eye protection, sunglasses are fine), and proper clothing for your assignment. And please don't forget your sunscreen, hat, bug spray, or water bottle. All volunteers must follow current CDC and MLTS COVID protocols.

Trail Days are made possible by the Town of Mammoth Lakes, Inyo National Forest, Mammoth Lakes Recreation, and Mammoth’s own Measure R! Special thanks to KMMT Radio for airtime to get the word out!

We hope you’ll join us this summer to Build – Host – Care – and Re-Connect.

See you on the trails!


View or download the Series Flyer!

If you have questions or are interested in sponsorship, please contact us:



  • 132 Volunteers
  • 1 mile of New Trail Construction in the Lakes Basin
  • 8 New Adopt A Trail Signs Installed
  • 42 Hours of Volunteer Hosts Assisting Visitors on the Trails
  • Many, Many Pounds of Trash picked up in the Lakes Basin
  • Brushing and Light Trail Maintenance on the Heart Lake Trail
  • $17,342.76 Labor Value