San Antonio Falls, at about 100 feet, is one of the most impressive falls in the Southern California area.  These falls are easy to get to via a short hike at only 1.2 miles round trip.  If you are hiking to the top of Mt. Baldy, these falls are a nice detour along the way.  The waterfall consists of three tiers and is best viewed after a rainfall. 

To reach the falls, park at the edge of the road near the gated Falls Road just past the Manker Flats campground.  An adventure pass will be needed.  Walk up the paved road and at the hairpin curve at 0.6 miles is where you will start to see the falls.  This is also where the road turns to dirt.  A dirt path at the road's bend provides better access to the falls.

To get there:

From Pasadena:

Take 210 freeway east
Exit Mountain Ave.
Turn Left and drive north about 5 miles to Mt. Baldy Road 
Continue on Mt. Baldy Road about 5 miles and past the Mt.Baldy village 
Park near Falls Road (left side) just past the Manker Flats Campground
The trailhead is at the locked gate on Falls Road