Astoria Has a Tourist Trolley , North Edge of Town along the river shore , part of the MUP route is Trestles Planked in with 5 4X12 between the rails,
and a few more to the sides.
Its only back On "Land" that you can pick a diagonal route, + entering and leaving ends the Trestle, over water .
Other than that You need to pay attention to staying on a Plank.
As they wear and shrink the gaps beween the Planks Widen, doing its own bit of steering control seizure for road Bike Riders ..
Owner of the Specialized dealership in Cannon Beach took a Nasty fall because of that, on His Bike ..