Tillicum Beach is a U.S. Forest Service recreation site near milepost 160 on US 101, south of Waldport, Oregon, and north of Yachats. There is a day use area with a half-dozen paved parking spaces and beach access 71 . The landward-facing beach access point identification sign was present as expected, but there was no beach-facing fluorescent green sign for beach hikers. There is a day use fee of $7, but I hung my Northwest Forest Pass and didn't get a ticket.
The sandy beach was broad and flat in September 2019. I walked a quarter-mile north to Reynolds Creek; those willing to ford creeks could walk past a low-lying unincorporated neighborhood to Beachside State Recreation Site and beyond, past The Big Stump and Governor Patterson Memorial State Recreation Site, to Waldport.
To the south, if you timed the tides right, you could probably walk to the end of the Yachats 804 Trail where the beach ends and the rocky shore begins at the town of Yachats.
I drove through the Tillicum Beach campground, and found another different beach access point also numbered 71 . This one had the landward-facing identification sign, and the expected seaward-facing fluorescent green numeric sign.
Tillicum Beach is managed by American Land and Leisure as a concessionaire of the National Forest Service. More at Outdoor Project, BeachConnection.net, and Google Image Search.