Coupon good for $1 off any rental or $5 off full day kayak rental for each member of your party. The Bass River is the largest all salt water tidal river on the eastern seaboard and one of Cape Cod's most beautiful harbors. Her shoreline's ever changing scenery is enhanced by her sparkling clean waters. Up river there is much unspoiled wilderness. Terns hover over their nests as you paddle only a few feet away. Ducks and geese swim nearby with their new families following close behind. You'll always see a large osprey's nest, and often catch a glimpse of snowy white egrets, great blue herons and protected terns.