The speed_snake_1.0.challenge.rar file you have requested: Maps Levels Missions / Tracks / Full Throttle / Speed Snake (1.0) - 20.3kb is not available. Perhaps try browsing all files for the game TrackMania Nations Forever and upload any files you want to share or are missing. This is the only information we could locate:
For more information on TrackMania Nations, visit Trackmania.filefront.com Speed Snake is a long, high speed track that runs on like a snake. There is one main track and another track zips through the main track like in a "snake" motion, hence the name.