We might call this Peterson Summit rather than Peak 1700 - it's a drive-up in the Coast Range about 20 miles north of Tillamook and 20 miles south of Cannon Beach. The road is totally "Prius-able" (passable in a passenger car).
From Highway 53 - the Necanicum Highway make your way to Mohler, Oregon. From the north, turn east just before the bridge over the Nehalem River, from the south, turn east just after the bridge onto Miami-Foley Road. After about one mile, continue east onto Foss Road. After about two miles, turn north onto Peterson Road.