there are actually a bunch of bike paths in reston, even though bike lanes are severely lacking. the w&od trail is pretty convenient, kinda like a highway for bikes almost. then there are a lot of paths through the woods. if you're interested, i'm sure if you stopped by the reston association office (it's off of wiehle, kind of near mctacohut), they'd have a 'paths of reston' map or something like that. it's not so great for going places at night, because then it's scary and dark, but for daytime stuff it's not too bad.

i guess i don't know about great falls though.

but, also, fyi, the w&od goes to dc.