Castle Rock

This Castle Rock is a named rock formation near Alton, in Kane County's Long Valley area. It's worth noting that Utah has several distinct features sharing this name — a well-known Castle Rock Campground sits roughly 100 miles north in Sevier County's Fishlake National Forest, and a separate sandstone Castle Rock landmark rises from Lake Powell near Page, Arizona — but neither of those is this feature near Alton.

Search doesn't turn up independent documentation for the Alton-area formation specifically, beyond its appearance as a named point on local mapping. Treat it as a backcountry landmark rather than a developed overlook or maintained trail destination until better local information surfaces — check with Kane County or Dixie National Forest resources if you want current access details.