The dark ones. The pale one is a Steller's Sea Lion.
Road-kill. This road had a concentration of roadkill: one each of raccoon, striped skunk, nutria, river otter, and red-breasted sapsucker in just under one mile. Water-filled ditches on each site of the road for part of the way, and road crosses a stream at a shallow angle.
Part of lower jaw with some intact teeth also found nearby