Permits to visit an Arizona canyon where waterfalls cascade into blue-green pools are nearly sold out, as expected.
The waterfalls on the Havasupai reservation have become increasingly popular over the years.
Permits to hike into the canyon and stay at a campground went on sale Friday and quickly were snatched up.
The tribe says only a few remain for early February.
The tribe's land in northern Arizona can be reached only by foot, mule or helicopter. Day hikes aren't allowed.
Anyone who has a permit and needs to cancel can transfer it starting next week — on option the tribe hasn't offered before.
Tourists also can reserve a pack mule online for the first time. Packs must be soft-sided and weigh no more than 32 pounds each.