San Bernardino County Sheriff Benjamin Franklin Mathews and his posse, led by John Rogers (a gang member sent to town to obtain provisions and captured after drunken boasting), found and surprised Henry camped in Railroad Canyon, then called San Jacinto Canyon, about 25 miles (40 km) south of town.

His corpse was taken back to town, photographed and displayed in Old West fashion.

[3][4] The California Southern Railroad constructed its main line to San Diego, down the San Jacinto Canyon from the Pincate Station south of what is now Perris to the Lake Elsinore Station in 1882.

Originally, the San Jacinto River ran southwestward across the Elsinore Valley through a delta wetland in the southeast end of Lake Elsinore near Rome Hill, but a flood control project enclosed the southeast end of the lake behind a levee and diverted the river into a boat channel just at the mouth of the canyon in recent years.

Railroad Canyon is located on the USGS Lake Elsinore topographic map.