Difficulty: Short road and trail route that is easily accessible by most people, but with one narrow and eroded section of trail
San Antonio Creek rises from the melting snows of Mt. San Antonio (also known by southland residents as Mt. Baldy). The creek tumbles down through a steep alpine canyon with spectacular views. It then drops through a series of four waterfalls, culminating in 80-foot high San Antonio Falls. The magnificent lower falls is a relatively easy 1.4-mile roundtrip walk from the Manker Flat parking area. This walk provides a fine destination for a family picnic. One mile of the creek upstream of the lower falls is proposed by San Gabriel Mountains Forever for Wild River designation and part of it is located in a proposed addition to the Sheep Mountain Wilderness. The remaining three miles of the creek downstream of the falls is proposed as a Recreational river.
How to Get There
From Interstate 210 in the City of Upland, take the Mountain Avenue exit and drive north 9.5 miles to where it dead-ends in Mt. Baldy Road. Turn right on Mt. Baldy Road and drive 5.25 miles north through Baldy Village to the parking area at Manker Flat. The Mt. Baldy Road heads off to the left of the parking area but is gated and motorized access is limited to local cabin owners and the Mt. Baldy Ski Resort. Walk .6 miles up the paved road to the first switch back. Magnificent San Antonio Falls can be seen from this point. A short dirt trail drops down from the road switchback to the base of the falls. Care should be taken as erosion has narrowed the dirt trail in places. You will need to purchase a $5 Adventure Pass to park at Manker Flat. The pass is available at the Forest Service visitor center in Baldy Village.