5,200-foot elevation. Day use hours are 6 am to 10 pm. During the winter months, Charlton Flat may close at any time due to snow and/or ice. Please contact the San Gabriel Mountains National Monument- Acton Work Center at 661-269-2808 for the most current information.
Charlton Flats Picnic Area is primarily first-come, first-served. Use the availability view to gauge how busy it is before you go.
See the map for Charlton Flats Picnic Area's exact location and directions.
Pick your dates on the availability calendar, then reserve through the official booking link. You can also set an alert and we'll notify you if a sold-out date opens up.