Author Bio

Billy Hafferty

Billy is an enthusiastic endurance junkie and coaches running and triathlons. Originally from Boston—but currently exploring Colorado—Billy aims to inspire others to get outside and enjoy more trails. He’s rarely caught without a smile, joke, or uplifting advice. Feel free to contact him or read more of his work here.

Stories by Billy Hafferty...
Learn How to Crush Hills

Learn How to Crush Hills

Want to improve your efficiency and up your running confidence? Head for the hills. I started my running career in Boston: Home to Heartbreak Hill, arguably,...

Sign up for REI Co-op emails

Stay updated on the latest news, deals, & more.
Please use format Example:

Check your inbox for more perks. We’ll send you a few emails every week.

You can unsubscribe from REI Co-op emails at any time.


Hmm. Something’s not working on our end.