From Washington MO, take MO 47 south to Union MO, then get on Highway V going East. Go straight across MO 100 to continue onto Highway T. You will take this all the way to Wildwood, where you can jump back on 100 (part of route 66).
The scenery along this route is very similar to the scenery along 94 north of the MO river, but with a few more residential areas. It's a curvy two lane road, with lots of hills & trees, and a couple of quaint little towns, such as Labadie.
Lots of sweeping curves and twisties along this route. Good quality pavement. Be careful going through residential areas; watch for traffic entering the roadway.
This is a mostly rural/wooded area. However, you can find what you need on either end of the route. We didn't stop, but we saw a few other bikes that had stopped at what looked like a bar and grill in one of the few small towns along the route.
Motorcycle Road Additional info
We had been riding 94 west earlier in the day, and took a pit stop at Washington MO. Due to construction on 47 causing a northbound traffic stall, we really didn't want to go back up to 94. So, we took this route back to St. Louis instead of retracing our steps. We were glad we did!
The Hwy T "bypass" of Hwy 100 is one of my "go to" roads. I'm constantly amazed by how many long time riders in the St. Louis area don't know that it exists. Lots of twisties, both up and downhill. While it's two lane for the entire length, T does have some spots where it's a very narrow two lanes, with no shoulders and pavement that drops off into deep drainage ditches. At the Wildwood end, it goes past the St. Albans Country Club golf course, so be mindful of the folks on the links as you go past.