savage24 from KC,MO on 9/8/2006 8:54:57 AM:
Since no one else spoke up, I'll try. The most direct route with the least traffic would be:
Route M north out of Pilot Grove, once M crosses I-70 it turns west. Continue west on M to Route K. Take K north through the town of Blackwater (worth a visit - http://www.blackwater-mo.com/) to route 41. Take 41 north to Arrow Rock.
I have driven route M north of I-70, though it has been several years (I grew up in the area). It has very little traffic and I suspect that traffic volume between I-70 and Pilot Grove would be light as well. Route K has light traffic also. You would probably encounter more traffic on 41, but I would not hesitate to ride on it, in fact I hope to ride to Arrow Rock some day. This route will have hills and curves. I would dress for visibility and listen closely for approaching vehicles.
I would not recommend riding highway 135; it carries the majority of the traffic between Boonville and Pilot Grove.