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<p><span id="docs-internal-guid-47634f68-d59e-d71a-bf09-9b324f341e57"><span style="font-size: 10pt; font-family: Arial; color: rgb(33, 33, 33); vertical-align: baseline; white-space: pre-wrap;"><strong>Number 2: Grand Canyon National Park.</strong> 5,969,811 people visited Arizona’s Grand Canyon N.P. The large number of people is not surprising given it is within driving distance of Tucson, Phoenix and Las Vegas. The first time people see the Grand Canyon, many are at a loss for words and left awestruck by its incredible beauty. The canyon is 277 river miles long, up to 18 miles wide and a mile deep. Visitors can hike a wide variety of trails that are perfect for hikers of all ages. Keep an eye peeled for <a href="http://trailmob.com/field-guides/fauna/hoofed-mammals/elk" target="_blank">elk</a>, <a href="http://trailmob.com/field-guides/fauna/hoofed-mammals/mule-deer" target="_blank">mule deer</a>, <a href="http://trailmob.com/field-guides/fauna/hoofed-mammals/bighorn-sheep" target="_blank">bighorn sheep</a> and the endangered <a href="http://trailmob.com/field-guides/fauna/birds-of-prey/california-condor" target="_blank">California condor</a>. PC: </span></span><span style="color: rgb(68, 68, 68); font-family: Roboto, Helvetica, Arial, sans-serif; font-size: 13px;">https://goo.gl/mcZmcz</span></p>
A Nevada geology professor says he recently identified fossilized tracks from a reptile along a popular trail in Grand Canyon National Park.
The Las Vegas Review-Journal reports that University of Nevada, Las Vegas, professor Steve Rowland says the tracks belong to a primitive reptile the size of a baby alligator and date back about 315 million years.
The 28 footprints run diagonally across a boulder on the edge of the Grand Canyon's Bright Angel Trail.
Rowland shared his findings at the Society of Vertebrate Paleontology's annual meeting last month in Albuquerque, New Mexico. He hopes to submit a scientific paper in January.
Rowland first saw the prints last year during a family vacation to the park after hearing about them from another geologist.
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