With GPSies you can view and download tracks which have been recorded by a GPS device. Whether you are searching for running courses or Mountain Bike Tracks, with GPSies you can see what Tracks others have recorded. And you can download all the Tracks and put them onto your GPS device so you won`t lose your way.
EveryTrail is a mobile travel companion that enables travelers to Track, Share and Search Trips. EveryTrail also offers apps for iPhone, Android and other mobile platforms.
[Update] Route sharing website based and focusing on the UK.
Bikely helps cyclists share knowledge of good bicycle routes.
WikiLoc is a free web app that lets you share GPS tracklogs and waypoints on the web in an easy way
German: Hier findest du kostenlose Touren mit GPS Tracks zu Outdoor Aktivitäten in beliebten Kategorien wie Mountainbiken, Wandern, Reiten, Ski etc.
Just publish your route as a public weblog entry or directly display the route at GPSies and check the Panoramio checkbox.