Hiking up Nate Harrison Grade. A 5 mile, hard, steep hike all the way to the top. Located in Palomar Mountain, San Diego, California. Surrounded by Cleveland National Forest. There is a magical history about this hike. Nate Harrison Grade is named after Nathaniel Harrison, a freed slaved in the late 1800s. Listen to the experience and adventures from some day hikers and overnight hikers. Get ready for some F words and funny laughs. They each share their amazing experience at Harrison Serenity Ranch. A place that must be on your list! You can camp, glamp or rent a cabin. We share the best drinks, music, laughs at the top! What can I say, Girls just wanna have fun!