Exit I-75 at the Grayling / Traverse City exit.  Stay on the Business Loop 75 / M-72 (West) for approximately 7/10 mile to the second light.  Turn Left onto M-72 (West).  Go 18 miles to County Rd 571.  Turn Right (North)  and go 13 miles to Mancelona.  County Rd 571 will end in Mancelona at the intersection of M-66.  Turn right onto M-66.  At the first light, turn left onto M-88. Traveling North and West along M-88 you will go past Shanty Creek & Schuss Mountain resorts, then into Bellaire (13 Miles). Going into Bellaire, follow the corner to the left and into downtown.  You will come to a four way intersection.  Go straight through this intersection and Riverside Marina will be on the left, before the bridge, next to the river.