Bottomless Lake may refer to:
Bottomless Lakes State Park in New Mexico, U.S., its oldest state park Bottomless Lake (Oregon), a dry lake in central Oregon, U.S., once part of Summer Lake (Oregon) Lake Manitoba, a lake in Manitoba, Canada
Other Grundloser See in Germany; grundloser see is German for bottomless lake Lacul Fără Fund in Romania; lacul fără fund is Romanian for the bottomless lake