The entrance is about 200 yards south of Rye Harbor on NH-1A. One can either park at Rye Harbor for a small price or park at the entrance of the walkway. There is limited parking there. The entrance is not marked well so you can easily pass by it. Take the path. It will split into 2. The way to the platform is easily marked and short. There is another path that takes you to a piece of land that takes you to a strip of land that goes nearly to the center of the marsh. This path is not well marked. Just like going on any trails in New England, check for ticks later after completion of the visit. 

Awcomin Marsh is on NH-1A in Rye, directly across from Rye Harbor Marina and just south of Rye Harbor State Park. Awcomin Marsh is a coastal wetland that was restored in 2005 after decades of being degraded by dredge disposal. The marsh provides habitats for fish, birds, and plants, and protects the seacoast from flooding and erosion. The marsh can be accessed by a short trail and a viewing platform near Rye Harbor State Park, where visitors can enjoy the scenic beauty and learn more about the importance of salt marshes.