Designated U.S. Marine Highway Routes
West Coast
- M-5: Pacific Ocean Coastal Waters
- M-5AK: Alaska Coastline
- M-11: Alaska Coastal Waters
- M-84: Columbia, Willamette, and Snake Rivers
Pacific
Great Lakes
- M-71/77: Lake Erie
- M-75: Detroit River and Lake Erie
- M-90: Great Lakes and St. Lawrence Seaway System
Inland Rivers
- M-3: Kaskaskia River
- M-29: Missouri River
- M-35: Upper Mississippi River
- M-40: Arkansas, Verdigris, and White Rivers
- M-49: Atchafalaya River and the J. Bennett Johnson Waterway
- M-55: Mississippi and Illinois Rivers
- M-65: Mobile - Black Warrior Rivers and Tombigbee Waterway
- M-70: Ohio, Mississippi, and Missouri Rivers
Gulf of Mexico
- M-10: Gulf Coastline
- M-69: Bay Texas Gulf Intracoastal Waterway
- M-146: Houston Ship Channel, Buffalo Bayou, and Galveston
East Coast
- M-64: Hampton Roads, Chesapeake Bay, and James River
- M-79: Allegheny and Ohio Rivers
- M-87: Hudson River and Erie Canal
- M-95: Atlantic Ocean Coastal Waters
- M-295: East River, Long Island Sound, and Block Island Sound
- M-495: Anacostia, Occoquan, and Potomac Rivers
Caribbean
Last updated: Tuesday, February 27, 2024