What is the longest off-road portion of the East Coast Greenway as of 2018?
On the "Historic Coastal Route" alternate there is a 51 mile (82 km) separated paved cycle path, the Virginia Capital Trail. I had the privilege of riding this last year on my ECG tour.



One end of the path is near downtown Richmond on the riverfront.



It remains off road for the next 51 miles or so, though it does cross the highway several times.





The other end is at the Jamestown Settlement, a few hundred meters from the Jamestown Ferry (also part of the ECG route).





When complete, the Florida Keys Overseas Heritage Trail will be longer than this, at 106 miles (171 km). But currently its longest off road segment is 34 miles (55 km).

The M-Path Trail and South Dade Trail, in Miami-Dade County, Florida, connect to each other to form a continuous 30.3 miles (48.8 km) leading out of Miami towards Homestead. 

Unfortunately I wasn't able to cycle this region last year due to Hurricane Irma. I look forward to going sometime soon.



If you're considering an ECG tour, keep in mind that even at this early stage, many of the on-road route sections have good hard shoulders or cycle lanes or both.



Most of the places where there aren't hard shoulders or cycle lanes are on very quiet rural roads.



But it is still helpful to have some experience with road riding. There are a few places where you may need to take a full lane with cars going 60mph (100 km/h), such as this 2 mile (3 km) bit just across the border in North Carolina.