Trail Running is one of the fastest growing sports communities in the world and arguably the most inclusive and inviting sector in the world of running. Whether you enjoy running local trails or heading out for a mountain or desert adventure just east of San Diego, USATF SD-I is dedicated to the mission of providing individuals with as much information as possible for trail running resources, running clubs, race information, and overall trail information. San Diego boasts some of the most varied trail running terrain in the entire USA. Locally we have many canyons, mountains, and lakes to explore, whatever adventure you are into. While many associate San Diego with our beautiful beaches, few know that when it comes to trails, we have some amazing canyons, lakes, and mountains to explore throughout the county: Lake Hodges, Lake Cuyamaca, Black Mountain, Daley Ranch, and Mission Trails, to name a few. These and other local open spaces offer free parking, nature centers, and miles of trails to explore.