About 3.5 miles from the Alamitos Trailhead a spur trail takes a side trip to Serpent Lake. The trail climbs steeply up Jicarita Peak Ridge for another mile. The Jicarita Peak Ridge is barren and exposed and should be avoided during bad weather.

This trail climbs from Alamitos Trailhead to the Jicarita Peak Ridge then descends 1,000 feet in elevation into the East Fork of the Rio Santa Barbara drainage. The 1,000 foot drop into the drainage is steep and difficult.

Trail 19 can also be accessed for the Agua Piedra campground on State Highway 518. The trail form Agua Piedra campground to the East Fork of the Rio Santa Barbara is 16 miles.

This trail climbs from Alamitos Trailhead to the Jicarita Peak Ridge then descends 1,000 feet in elevation into the East Fork of the Rio Santa Barbara drainage.