As you are not specific as to the criteria regarding which 42 of
all Maryland's rivers - Anacostia River Antietam Creek Back River
Ballenger Creek Bear Creek Big Pipe Creek Bird River Blackwater
River Bodkin Creek Bread and Cheese Creek Broad Run Budds Creek
Bush River Casselman River Cabin John Creek Carroll Branch Catoctin
Creek Chester River Choptank River Christina River Conococheague
Creek Cuckold Creek Curtis Creek Deer Creek Deep Run Dividing Creek
Dry Seneca Creek Dundee Creek Elk River Flintstone Creek Frog
Mortar Creek Furnace Creek Georges Creek Great Seneca Creek
Gunpowder Falls Gwynns Falls Hawlings River Herring Run Horsepen
Branch Indian Creek (Anacostia River) Indian Creek (Patuxent River)
Jones Falls Licking Creek Limekiln Branch Little Choptank River
Little Falls Branch Little Monocacy River Little Paint Branch
Little Pipe Creek Little Seneca Creek Lyons Creek Magothy River
Marley Creek Marshyhope Creek Mattawoman Creek Middle Creek (Toms
Creek) Middle River Minnehaha Branch Monocacy River Moores Run
Muddy Branch Nanjemoy Creek Nanticoke River North East River
Octoraro Creek Paint Branch Patapsco River Patuxent River
Piscataway Creek Pocomoke River Port Tobacco River Potomac River
Rhode River Rock Creek Rock Run (Potomac River) St. Marys River
Saltpeter Creek Sassafras River Savage River Seneca Creek Severn
River Sideling Hill Creek South River Sligo Creek Stony Creek
Susquehanna River Swanson Creek Toms Creek Tuckahoe Creek Watts
Branch (Anacostia River) Watts Branch (Potomac River) West River
Wicomico River (Potomac River tributary) Wicomico River (Maryland
eastern shore) Wills Creek (North Branch Potomac River) Wye River
Youghiogheny River