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Arthur’s Rock Professional Review and Guide
"Arthur’s Rock Trail is the most popular hike at Lory State Park. It features an easily accessible route through shaded valleys filled with wild plums, upland meadows, ponderosa pine groves, and bare granitic knobs. Along with Horsetooth Rock to the south, the craggy summit of Arthur’s Rock provides the best views of Fort Collins and the intervening, sinuous hogbacks and 6-mile-long Horsetooth Reservoir. Interest points along the way: (1) the narrow gulch just beyond the trailhead formed by a transition from nonresistant, 300-million-year-old sandstone to hard, 1.4-billion-yearold granitic rocks; (2) open meadows and ponderosa pine forests on friable schist below Arthur’s Rock; and (3) the bare summits and cliffs of Arthur’s Rocks, formed by a large intrusion of 1.4-billion-year-old granitic rock."
--John Gascoyne (And the Colorado Mountain Club), The Best Fort Collins Hikes (Colorado Mountain Club Press).
Definitely a trail not to be missed if you live in fort Collins. You can do the up and back version from the 3rd trail entrance after the Ranger station which will take about an hour and a half. Some steep steps along the way but beautiful valleys to see. You can also go the back way up which i prefer. Take the first entrance after the Ranger station and hike up the Timber trail. Go past the bride and hike keep going through all of the switchback (12 I think) and then go south until you come up on Arthur's from the west. You can go back the traditional way or the way you came. The back way will add a couple of hours to the overall hike.
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