Marysol
Google
I hiked an out-and-back trail to both Switzer Falls and the Bear Canyon picnic area which was about 7.6 miles. If you do a hike just to Switzer Falls and back to the lot, it's less than 4 miles. I went on New Years Day beginning around 8am so there were a few parking spaces available at the time, but please note, if you arrive later, the lot does fill up and you will be waiting with many many other cars to grab a spot. Otherwise, you'll have to park in the upper lot or along the Angeles Crest Bywy. You can buy a day pass at the Shell gas station in La Cañada Flintridge for $5 so you don't have to risk getting ticketed at the trail site.
The trail itself is absolutely beautiful and it is mostly shaded, but there is a portion heading down to the falls that is not shaded. On a clear day, you will be able to see DTLA, and there are gorgeous views of the mountains. There is a hiker swing on the way to the falls, the trail is clearly marked so be aware of the forks which lead you to the falls and the other which leads you to the Bear Canyon picnic area. There are several river crossings, but it was mostly dry when I went so the water wasn't too deep. There are also many gorgeous, clear, natural pools both at the Falls and more on the Bear Canyon trail. Would definitely return to hike a new trail.