The large amount of land within the Los Angeles County Drainage Area flood control system constitutes a significant portion of the remaining open space in teh Los Angeles urban region. There is excellent potential for using parts of this land for recreational facilities, such as regional trails, linear parks, wildlife sanctuaries, and facilities for water-related recreation. The purpose of this study is to investigate the potential of the LACDA system for such recreational development. The study includes the flood channel system, spreading grounds, and debris basins. The basins and reservoirs are not included, since master plans are done for these areas on an individual basis.