I like Forrest Falls area, I used to go up there a lot. Take the 10 E towards Redlands, exit left Alabama, right onto Lugonia, and take that all the way up, Lugonia turns into hwy 38, which takes you up the mountain, but Forrest Falls isn't that far up. Follow the signs, stop at the ranger station for a day pass( $5). You will start to head down a narrow road, and past a fire station and it will end into a recreation area. There is a huge waterfall you can hike up, some of it is in the water so bring shoes with good grip. There are also small pools made in the rocks, which makes it especially great in the summer time. But it's all melting snow so even in August the water is very cold! My friend saw a bear there once so keep that in mind. Once you get to the top the view is great, it really makes you appreciate so cal in a different way.