Warm Springs Trail, summer

E-bikes are not permitted on Bald Mountain’s trails, including the Warm Springs Trail, seen here.

If you’ve grown accustomed to huffing and puffing up your favorite dirt road or mountain biking trail and have been passed by someone who doesn’t seem to be working very hard at all, you may have been dusted by someone on an electronic bike, or e-bike for short.

The secret: Onboard batteries give pedalers a boost.

Agencies in and around the Wood River Valley are regulating these ubiquitous and increasingly popular machines, keeping them off limits on many trails prized by traditional cyclists, such as Fox Creek and Lake Creek and the single-track trails around Galena Lodge.

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