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Volunteers listen to trail building organizers. Last year, about 25 cycling enthusiasts gathered along the Rainbow Rim Trail the weekend of Sept. 28-29 to learn about sustainable trail design from trainers with the International Mountain Bicycling Association. Photo/USDA Forest Service, Southwestern Region, Kaibab National Forest.

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Public invited to help build mountain bike trail on North Kaibab

FREDONIA, Ariz. - Anyone with an interest in mountain biking is invited to help build bike trail along the scenic Rainbow Rim overlooking Grand Canyon next month.