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Rainbow Rim is a popular mountain bike trail that allows overlooks of the Grand Canyon.Above: about 25 cycling enthusiasts gathered along the Rainbow Rim Trail the weekend of Sept. 28-29, 2012 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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North Kaibab to extend popular Rainbow Rim trail by eight miles

FREDONIA, Ariz. - Outdoor recreation lovers will soon have some additional opportunities to enjoy the Kaibab Plateau as well as breathtaking overlooks of the Grand Canyon. The North Kaibab Ranger District of the Kaibab National Forest will begin work this year to extend the popular Rainbow Rim trail by an additional eight miles.