Visiting Burlington for the first time, camping in Colchester (just north). Airport Park is not at an airport but has parking for the many people who use one or more of the trails intersecting at this park. There are three trails that meet here.
One is a 4 mile trail that is a rail trail on a causeway between this area and Grand Isle. If you take this trail, at its end on the causeway, you can take a bike ferry across a short gap in the former train track and continue on the island, where this path ends but there are many sparsely traveled roads to ride on, you can ride as many miles as you want, and/or also take another ferry across the lake to New York.
Another trail leads to the waterfront in downtown Burlington. It stays near the waterfront for the entire journey. It is about 7.5 miles from Airport park to its southern terminus. Various sections were under re-hab but it is otherwise a very nice trail, and well-used especially near downtown Burlington.
The third trail extends from the park north along the Mallets Bay lake front into Colchester and includes some short stretches on city or sub-division streets, but is otherwise well-marked and pleasant. It is somewhat hilly but not unpleasantly so.
All three trails are interesting and pleasant.