The southernmost national forest in California, Cleveland National Forest encompasses nearly half a million acres of dry, hilly brushland. It's a popular getaway for San Diegans in the summer months, offering a small number of Forest Service-run campgrounds plus ample opportunities for hiking, horseback riding, and off-roading. The oftentimes clear skies and high elevations found throughout the park lend themselves particularly well to stargazing, and San Diego State University uses the forest for astronomical activities ranging from scientific research to public stargazing parties. The forest is also the site of the university's Mount Laguna Observatory.

• Best for getting away from it all: Blue Jay Campground offers 50 spaced-apart sites surrounded by brush and grasslands for a wilderness feel.
• Best for stargazing: Laguna Campground attracts astronomy fans in the summer months, with regular San Diego State University-sponsored star parties.
• Best for gorgeous views: At 6,000 feet above sea level, Burnt Rancheria Campground offers epic views over the desert. On clear days, you can see the Salton Sea.

1. Most of the campsites in the Cleveland National Forest are only available on a first-come, first served (FCFS) basis. Arrive in the morning for the best selection.
2. Reservable campsites can be booked up to six months in advance on the National Park Service website. Reservations open at 7am Pacific Time. If you have your heart set on a specific site, then it’s wise to wake up early to secure your spot.
3. Weekend FCFS camping can be challenging to secure, particularly in summer, but if you can come earlier in the week to claim your spot, you’ll have better chances.

Cleveland National Forest offers year-round recreation, though it's at its most popular in the summer months, particularly for campers and hikers. The period between the Memorial Day weekend and Labor Day is busiest, so it's a good idea to visit in September or early October to strike a balance between good weather and fewer crowds. The forest gets some snowfall in the winter at higher elevations, and chains can be necessary to navigate the roads.

• Cell service can be spotty in parts of the Cleveland National Forest, so it’s a good idea to download offline maps before you set out.
• You are allowed to collect firewood in the forest, but you will need to obtain a permit through the Descanso, Palomar or Trabuco Ranger District offices in order to do so.
• Wildfires are an issue in the Cleveland National Forest, and fire restrictions are frequently put into place. Portable stoves are generally allowed during fire bans. Check with a ranger station or on the Cleveland National Forest website before starting a fire.

• Experience the wonders of camping at William Heise County Park, a hidden gem nestled in nature's embrace. Set up camp amidst towering trees and enjoy the peacefulness of the surroundings.

• Escape to Agua Caliente County Park for a rejuvenating camping experience. Camp amidst tranquil surroundings, soak in natural hot springs, and enjoy stargazing under clear night skies.