Duck and Marathon are separated by about 10 miles of driving on Hwy 1. Duck is out there all by itself and the majority of people are older or retired. There s a few retail places just across the bridge near the entrance on Duck Key Rd, but otherwise, pretty much villas and homes. Duck is quiet. Marathon is an older and a much bigger community. It s much more business oriented, with an airport and shopping. On the side streets, it s quite a mix, with upscale homes built next to trailers. People that live on Duck go to Marathon to shop, gas-up, or grab a bite at the drive-thru.
no they are not the same but they are very close, marathon is a bigger town. both are very boring, mostly families. i would head over to key west which is not too far from marathon. the tiki bar can be fun at times but that is isle morada. good travels