I know relive.cc tried something similar with just a video playback before being shutdown by Strava.
Would you consider opening this as a platform for others to post their Strava activities?
While the project is ongoing (probably another month or so), it'll just be for the climbers. But, yes, when they are done I intend to release something that will allow anyone to put their own Strava activities on it. One huge caveat, and one of the main down sides of rolling my own mapping tech, is that I've only processed imagery and elevation data for the Sierra Nevada region.
That means I’ll have to do all my cycling in the Sierra Nevada region ;-)