I'm fairly new to 6mile, so forgive my ignorance.
I park in the lot next to the canal. I've been out as far as Middlebush, but I did not see the continuation of the trail. Is it directly across, or do I have to travel on SMB to gain entrance?
Is it possible that you were actually on Blackwells Mills Road? The Blue trail goes out to that road. Most of us use the bridge to cross a creek and then jump back into the woods on the same side of the road.
I don't think I was on BWM. I rode through the trail section, along the cultivated land then through a small wooded section that had a small steep drop that lead right onto the road.