The 460 homes of Alto Sutton can be found within county and Mill Valley city limits. Boundaries include the following: Horse Hill Preserve/Lomita Avenue to the North, a 55-acre parcel of grassland that is part of Marin County Open Space, with 11 horses and public hiking trails; Alto Center shopping center/E. Blithedale Avenue to the South; Mill Valley/Sausalito Multiuse paved Pathway (horses, pedestrians, cyclists) to the West; HWY 101 to the east. Edna Maguire Elementary School sits at the Northwest corner of Alto Sutton, where the multi-use pathway ends.
