Create route from list of waypoint and otehr question

Hi:

I dug out my eTrex Vista HCx from my drawer recently for some upcoming dirt bike adventures. In my HCx I have a bunch of way points (250) that I think came from a track I did during a mountain bike ride. I'd like to convert that into what I think is a "route" (altho Garmin's terms confuses me), that I can use either in my Vista HCx or on other devices.

Anyone knows how to do that?

Also, is it possible to delete waypoints, tracks, etc... on the device from BaseCamp?

Thanks.

denis