Lassen County is a county located in the northeastern part of the U.S. state of California. It was formed in 1864 and has a total area of 4,720 square miles (12,220 km2). As of the 2020 census, the population of Lassen County was estimated to be 29,633.

Merrill Campground is a popular camping destination located near Susanville, California, along the western shore of Eagle Lake. It is managed by the Lassen National Forest and offers a range of amenities and outdoor activities, making it a great spot for nature lovers and outdoor enthusiasts.

Aspen Grove Campground is a serene camping area located near Susanville, California, offering a peaceful retreat in the Lassen National Forest. Known for its proximity to Eagle Lake and beautiful natural surroundings, it's an excellent spot for outdoor enthusiasts.

Rice Canyon OHV Area is open to all types of vehicles such as motorcycles, all-terrain vehicles, utility terrain vehicles and four-wheel drive vehicles. The area provides excellent motorcycle hill-climb opportunities for the more experienced rider as well as loop track riding.

Mountain Meadow Ranch Summer Camp is a traditional family owned-and-operated California summer camp located north of Lake Tahoe in the Sierra Nevada Mountains. Uniquely located on a spacious 900 acre ranch, the summer camp is co-ed and for kids ages 7 to 16.

The Diamond Mountain Casino is a popular casino located in Susanville, California, in the northeastern part of the state. The casino is situated on the western edge of town and offers a range of gaming options, as well as dining and entertainment options.

The Lassen Historical Museum showcases artifacts and old time lumbering equipment. The museum is adjacent to Roop's Fort, the oldest structure in town providing the history of Susanville's last 150 years.

Susanville Ranch Park is a beautiful 1,100-acre park located in Susanville, California. The park is home to a variety of wildlife, including deer, coyotes, mountain lions, and bald eagles, making it a popular spot for nature lovers and outdoor enthusiasts.