From Garden State Parkway:
Exit 98 to route 138 east.
Go about 3.5 miles and swing left onto route 35 north. 
At the 4th traffic light, turn left into the Belmar Marine Basin.

From Pennsylvania Turnpike Extension:
Take N.J. Turnpike exit 7a to U.S. I195 east
this becomes route 138 east when it crosses the Garden State Parkway. 
Continue for about 3.5 miles and swing left onto Route 35 north. 
At the 4th traffic light, turn left into the Belmar Marine Basin