Hey there,
tahlwin!
The route that you're planning is pretty decent. But if it were me, I'd do it in reverse order, going counter-clockwise vs. the clockwise direction. Here are a couple reasons why:
- It's best to head south on 101. The biggest reason is that the wind is primarily out of the NW in summer, so unless you like biking into a constant headwind all-the-time going north, head south instead.
- Also, the ocean will be to your right, so you don't have to cross 101 to stop at overlooks or beach access.
- Plus, since 95% of cyclists head north-to-south, ODOT takes this into account. If there's a spot where there's not enough room for a shoulder on both sides of the road, they'll drop the shoulder on the northbound side.
- The climb on the Nestucca River Road is more gradual coming from the west, as you are following a valley up to the summit of the Coast Range. Approaching from the east, the grades are more severe, with some stretches of sustained 7-9%
The section of 101 from Astoria to south of Tillamook is okay for the most part, though there are a few caution areas, like Arch Cape Tunnel. The Adventure Cycling route has you stay inland from Astoria to Seaside with one good climb. 101 here is flat and has a wide shoulder, but lots of traffic. Make sure you get off 101 at Tillamook and take the Three Capes Route (though part of it may be still blocked due to a slide). This way you get to stop at Cape Lookout. You'll need to get back on 101 for about 4 miles until the Nestucca River Road turnoff at Beaver. It's pretty hairy, but there's no real alternative.
As for going south? There's definitely good stuff going south, especially south of Lincoln City and down towards Florence. That'd be a different tour, though.