El Cajon is a city located in San Diego County, California. With a Mediterranean climate, El Cajon has warm and dry summers, and mild and wet winters. The city is situated in a valley and is surrounded by mountains, with the San Diego River running through it. The river is a crucial source of water for the city, but it is also prone to flooding during heavy rains. Outdoor recreation opportunities in El Cajon include hiking and biking trails in the adjacent mountains, fishing and boating in nearby lakes, and golfing at several golf courses in the area. The city also has several parks and playgrounds for families to enjoy.