Frenchman's Flat is a 2,200-acre day-use area on Piru Creek in Angeles National Forest offering access for fishing, swimming, and wildlife viewing with picnic tables and vault toilets available.

An Adventure Pass ($5/day or $30/annual) is required, and visitors should note that potable water is not available on-site—bring your own water and be prepared to treat seasonal stream water.

The area is open year-round but subject to fire restrictions that may prohibit campfires and portable stoves during high fire danger periods.