The circle_park_1.0.zip file you have requested: Maps Levels Missions / Tracks / Stadium / Circle Park v1.0 - 373.27kb is not available. Perhaps try browsing all files for the game TrackMania United Forever and upload any files you want to share or are missing. This is the only information we could locate:
This is an stadium track which should run on every system on which Trackmania Nations runs fluently. I put a readme-HTML-File (german) with the track.