Sentinel Spire

The first ascent of the summit was made May 3, 1960, by Layton Kor, Harvey Carter, and John Auld via the class 5.10 route, Fast Draw.

[9] This tower is composed primarily of cliff-forming Wingate Sandstone, which consists of wind-borne, cross-bedded quartzose sandstones deposited as ancient sand dunes approximately 200 million years ago in the Late Triassic.

[10] The floor of the canyon is Precambrian basement rock consisting of gneiss, schist, and granites.

Precipitation runoff from this geographical feature drains to the Colorado River, approximately 1.5 miles to the northeast.

The months April through October offer the most favorable weather to visit.