The own3ds_largest_map.challenge.rar file you have requested: Tracks / own3d's Largest Track - 12.3kb 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:
This map is addicted to be played on servers where the timer is not less than 10min. It's best if the timer is set on this track to min: 20min. It's a very big track. Download it and try it out, it's a good track, not hard.