There are 17 miles of hiking and biking trails along the lakeshore. The grounds are beautifully landscaped lawns, and there is a barbecue pavilion. Granite Lake Premier RV Resort is located at the confluence of the Snake and Clearwater Rivers. Here are the top 10 RV parks & campgrounds near Lewiston-Clarkston, ID. Idaho has many scenic drives for you to discover. If you want to rent an RV to visit the region, you will find RV rentals in the Lewiston-Clarkston area. There are many excellent RV parks throughout the area. The port also has a marina for personal watercraft that people use to travel through Hells Canyon and other natural attractions on the river. The cities have the distinction of being the furthest inland ocean port of the West Coast. They are sister cities and commemorate the famous Lewis and Clark Expedition. Lewiston-Clarkston is located at the confluence of the Snake and Clearwater rivers in Idaho where it meets Washington State.