The mushroom_bridge.challenge.gbx file you have requested: Maps Levels Missions / Tracks / Bay / Mushroom Bridge - 6.44kb is not available. Perhaps try browsing all files for the game TrackMania: Sunrise and upload any files you want to share or are missing. This is the only information we could locate:
For more information on TrackMania Sunrise, visit Trackmania.filefront.com Based off of Mario Kart's Mushroom Bridge seen in Double Dash!!, here is the Sunrise version in Bay.