Over the years I've seen several sites where people download Tracks from their GPS so others can follow them, they seem to come and go with no real definitive site to get free routes from.

Just found this place ROUTEBURNER which seems on first view a brilliant prospect.

The goggle mapping function is ace, and so fast too. Zoom in on the Uk and click the Chicksands route to show a map and route plan with elevation data (obviously did a few laps) - brilliant. I'm going to try this out by putting all our local routes on there, imagine if everyone did the same for all the UK great ride areas it would be a superb trail reference system. I'll let you know how I get on.