Mallard Bay Overflow is a free, first-come, first-served overflow camping area on Fish Lake that opens only when all regular campgrounds are full.

The site functions primarily as a day-use parking lot with overnight camping permitted during peak seasons, offering a more basic alternative to developed campgrounds in the area.

Limited cell reception (Verizon only) and no amenities make this best suited as a backup option when other Fish Lake recreation sites are unavailable.