HELENA, Mont. — National Park Service officials say motorized electric bicycles are now allowed in Yellowstone, Grand Teton and Glacier national parks, along with Wyoming's National Elk Refuge.

The joint announcement Thursday follows an order signed late last month by Interior Secretary David Bernhardt allowing the pedal bicycles with electric motors wherever traditional bikes can go in national parks.

The guidelines posted on the Yellowstone , Glacier and Grand Teton websites say e-bikes and traditional bicycles are barred from boardwalks, snow routes and nearly all backcountry trails.

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They also are allowed on pathways connecting the National Elk Refuge to Grand Teton National Park.

E-bikes can reach speeds of 28 mph or higher. Outdoor and conservation groups have objected to allowing them in parks without additional study or public notice.

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