Mile markers in the Florida Keys are critical to finding locations in the forty-plus islands. Addresses do exist, but many are hard to see or have been destroyed by storms.

The Florida Department of Transportation maintains green and white mile marker signs along both sides of the road. The signs start at MM 0 at Key West and increase every mile as US 1 winds its way east.

Where do the mile markers start in the Florida Keys? 

For our purposes, we start at MM126.5. This is the junction of US 1 and Card Sound Road as you head into the Keys. Card Sound Road also ends up in Key Largo but takes a circuitous route.

It should be noted that Alabama Jacks, a rustic Florida restaurant, is located along Card Sound Road. There is also a turn-off to an exclusive country club called Ocean Reef Club before getting into the Keys.

Note that different points between locations are noted in tenths of a mile. Therefore, as noted above, our beginning point is .5 of a mile from MM126. These are our calculations – you won’t find sign in tenths of a mile.

Understanding the Mile Markers in the Florida Keys

If we say there is a location at 66.2, that means it is .2 of a mile from the 66 MM sign. Since we start with the higher numbers, it would also mean the location is .8 of a mile from MM67.

If you do see an address, the odd numbers are located on the ocean side. Even numbers are on the Florida Bay side (aka, gulfside).

You can determine mileage by simply adding or subtracting numbers. For instance, the 7-mile bridge begins at MM40. That is 40 miles from MM0 at Key West. The other end of the bridge is MM47 – strangely, the 7-mile bridge is 7 miles long!

Note that things occasionally change. Fixed bridges may be replaced with draw bridges. Businesses may go out of business or change their name. We are publishing this for May 1, 2023. Updates will be made as we travel again through the keys.

How to Use the Mile Markers of the Florida Keys

 You can’t possibly keep track of all the locations noted here. The Florida Keys Mile Markers guide will keep you from getting lost. We also highlight in yellow those places the Florida Travel Blog recommends as you travel the Keys.

126.5 = Junction US 1 with CR-905 to/from Card Sound Bridge and Ocean Reef Club, Oceanside.

126.0 = End/Begin two-lane 18 miles of limited access road to Key Largo.

107.2 = Jewfish Creek drawbridge. Exit/enter Key Largo. (Begin “18-Mile Stretch” If northeast bound from Keys.)
106.5 = Card Sound Bridge turnoff to/from Ocean Reef via CR 905 Oceanside. Also, an alternate route to Homestead at MM127.
106.0 = Key Largo Chamber of Commerce, gulfside.

105.4 = Winn-Dixie Shopping Center, gulfside.
104.1 = Caribbean Club, bay front. The set for the 1948 movie Key Largo was modeled for this location.
104.0 = Jimmy Johnson’s Big Chill, bay front.
103.4 = Marvin Adams Waterway Bridge (The Cut), a canal that connects the Atlantic to Florida Bay.
103.8 = Opal Reefhouse Resort & Marina, Breezer’s for sunset. Bayfront
102.8 = John Pennekamp State Park entrance, oceanfront. 

99.5 = Turn-off for Skippers Restaurant on oceanside.

97.5 = Shell World.
96.5 = Baker’s Cay Resort.
95.3 = Key Largo Ocean Resorts, ocean side.
95.2 = Florida Keys National Marine Sanctuary building.

94.8 = Turn-off for Snappers Waterfront Restaurant oceanside.
93.8 = Florida Keys Wild Bird Center, bayside.
91.3 = Tavernier Town Shopping Center, Mariners Hospital.

91.0 = Tavernier Creek Bridge; enter Islamorada; Tavernier Creek Marina, Plantation Marina, gulfside.
90.1 = End 4-lane highway if going southwest.
88.5 = Plantation Key Government Center, Sheriff, Courthouse.

87.0 = Founders Park (Plantation Yacht Harbor), gulfside
86.8 = Betsy the Lobster (must see for pictures) – Treasure Village Gift Shop, gulfside.
86.0 = Weigh station for trucks, oceanside.

85.5 = Snake Creek Draw Bridge; Coast Guard Station, gulfside Enter Windley Key.
85.3 = Windley Key State Fossil Reef Geological Site, gulfside.

84.3 = Islamorada Visitor’s Center.
84.2 = Theater of the Sea and New Post Card Inn & Tiki, Charter Fishing, oceanfront. 
84.0 = Whale Harbor Bridge.
83.4 = Whale Harbor Inn, oceanside

83.0 = History of Diving.

82.5 = Mangrove Mikes, great breakfast and lunch, bayside.
82.2 = Islamorada Chamber of Commerce Red Caboose.
81.5 = Cheeca Lodge, oceanside.
81.2 = Worldwide Sportsman; great shopping, gulfside.
81.3 = Green Turtle Inn, oceanside.

80.0 = Roadside park, gulfside; Amara Cay Resort, oceanside.
79.8 = Tea Table Relief Bridge. Bud and Mary’s, oceanside. 

79.1 = Tea Table Channel Bridge.
78.0 = Indian Key Bridge.

77.1 = Lignumvitae Bridge.
77.0 = Robbie’s Marina, gulf front. Feed the Tarpon and shops.

73.6 = Boy Scouts Sea Base, gulfside; Calusa Cove Marina. Oceanside. 
73.4 = Anne’s Beach, Oceanside.
72.1 = Apogee of Channel #2 bridge.
71.8 = Craig Key.

71.4 = Apogee of Channel #5 bridge.
67.5 = Long Key State Park, Oceanside.

66.0 = Outdoor Resorts campground, bayside.
61.2 = Tom’s Harbor Cut Bridge.
61.1 = Entrance to Duck Key; Hawk’s Cay resort, Oceanside.
60.6 = Tom’s Harbor Channel Bridge.
59.9 = Enter/leave City of Marathon.
58.9 = Grassy Key, Dolphin Research Center.
56.2 = Curry Hammock State Park.
54.5 = Begin/end 4-lane.
53.5 = Entrance to Village of Key Colony Beach, Oceanside. Key Colony is a large development of homes.
53.1 = Vaca Cut Bridge, entering the business district of Marathon next 8 miles.
52.0 = Marathon County Airport, bayside.
50.0 = Museum of Natural History, Crane Hammock, gulfside.

48.7 = Fisherman’s Hospital, Oceanside; Sheriffs substation, Oceanside; Fla Highway Patrol.

48.5 = Tranquility Bay Resort, Marathon.
48.0 = Coast Guard, gulfside; turnoff to Boot Key.

47.5 = Knight’s Key.
47.0 = Begin/end of Seven Mile Bridge, Marathon City limits. To Pigeon Key (old 7-Mile Bridge), gulfside. Pigeon Key visitor’s center.
44.8 = Pigeon Key, gulf side which can be visited through tour busses near Sunset Inn at MM47.2 entrance.
41.7 = End of original steel truss railroad bridge and begin concrete arch bridge
40.0 = End/begin Seven Mile Bridge.
39.9 = Veterans Memorial Park, oceanside.
39.5 = Missouri-Little Duck Channel Bridge. 
39.0 = Ohio-Missouri Channel Bridge.
38.7 = Ohio- Bahia Honda Channel Bridge.
37.0 = Begin/end a short section of 4-lane highway.
36.8 = Bahia Honda State Park entrance, oceanside.
36.0 = Bahia Honda Bridge (4-lanes) old railroad camelback bridge, oceanside.
35.0 = End/begin 4-lane. 
34.1 = Camp Sawyer, Boy Scouts, oceanside.
34.0 = West Summerland Key.
33.0 = Spanish Harbor Bridge west end.

31.0 = Lower Keys Chamber of Commerce, Old F.E.C. railway marker, oceanside.
30.2 = Big Pine Key traffic stop light; gulf to Key Deer Rd. and Wilder Road. Shopping Ctr, Prison, Preserve, No Name Key turnoff, gulfslde. Continue to No Name Pub, if you can find it.

29.3 = North Pine Channel Bridge.
28.1 = Little Torch Key. 
28.0 = Torch Channel Bridge.
27.7 = Torch-Ramrod Channel Bridge. 

27.5 = Boondocks, restaurant, mini-golf, campground.
26.6 = South Pine Channel Bridge, east end of bridge, oceanside. 
27.0 = Ramrod Key.
26.0 = Niles Channel Bridge, middle.
25.5 = East end of bridge, oceanside.
24.0 = Summerland Key Sea Base.
23.5 = Kemp Channel Bridge, east end of bridge, oceanside.
21.0 = Cudjoe Key Subdivision on oceanside. U.S. Navy “Fat Albert” site, gulfside.
20.2 = Bow Channel Bridge to Sugarloaf Key.
20.0 = Mangrove Momma’s gulfside, KOA Campground oeeanside.
19.3 = Crane Blvd. to gulfside, Sugarloaf School. 
18.6 = Upper Sugarloaf Key.
18.8 = Park Channel Bridge.
17.8 = North Harris Channel Bridge. 
17.6 = Harris Gap Channel Bridge.
17.5 = Lower Sugarloaf Key.
16.3 = Harris Channel Bridge.
15.8 = Lower Sugarloaf Channel Bridge.
14.6 = Saddlebunch #2 Bridge.
14.3 = Saddlebunch #3 Bridge.

13.1 = Saddlebunch #4 Bridge.
12.8 = Saddlebunch #5 Bridge.
11.4 = Shark Channel Bridge.
11.2 = Shark Key.
11.0 = Big Coppitt Boat Ramp, oceanside.
10.5 = Seaside Park, Firehouse; SR 941 AKA Old Boca Chica Road, Oceanside, to Geiger Key Marina and Restaurant.
10.4 = Porpoise Point entrance, gulfside.
10.0 = Big Coppitt Key.
9.7 = Rockland Channel Bridge.
9.2 = East Rockland Key.
8.5 = Tourist welcome center.
8.4 = Begin/end 4-lanes.
8.0 = NAS Boca Chica Overpass, entrance to N S, ocean. Turnoff from both directions US-1. 
7.0 = Back gate to NAS, closed, oceanside.
6.1 = Boca Chica bridge, middle.
5.2 = Key Haven, ocean turnoff.
5.0 = Stock Island, gulf turnout to Jr. College Road, Golf Course on bayside.

4.5 = Turn-off to Hogfish Bar & Grill, on Stock Island, best hogfish sandwich anywhere!

4.2 = Hurricane Hole, restaurant and rentals.

4.1 = Cow Key Channel Bridge and bear right for Key West and US 1.
3.9 = Traffic light. End/begin 4-lane. Go left for Flagler Street; Airport; Martello Towers, Higgs Beach and Casa Marina. Bear right for US 1,  N. Roosevelt; Truman Avenue, Fort Zachary Taylor and Duval Street district.
3.0 = Sears Town shopping plaza.
2.3 = Salt Run Bridge, N. Roosevelt, Key West.
1.0 = About Frances Street.

0.5 = Turn-off to follow US 1 on Whitehead Street.
0.0 = Turn right on Whitehead Street for Hemingway’s House, Moon Dog’s Cafe and the Green Parrot at .2, Monroe County Seat; Key West Post Office.