To the millions of Los Angeles-area residents and to visitors from all over the world, the Angeles National Forest provides a thousand square miles of open space and a variety of recreation opportunities year-around. The Angeles offers natural environments, spectacular scenery, developed campgrounds and picnic areas, swimming, fishing, skiing and the solitude of quiet wilderness areas. Trails winding throughout the forest accommodate hikers, equestrians, mountain bikers and off-highway vehicle enthusiasts. Many of the facilities and services in the Angeles National Forest are free. Some areas and facilities in the Angeles, as well as in the other national forests of Southern California, require the Adventure Pass or other recreation fees to help maintain, manage and improve the amenities that forest visitors enjoy.