Secret Course 07
From the Super Mario Wiki
The course starts off by having the player jump onto a higher platform onto a Pause Block. The player must wait for all of the Fire Bars in the path to be out of the way in order to collect the first three Bonus Medals. After this, the fourth Bonus Medal is found in a high alcove and can be obtained by Wall Jumping. The fifth and final Bonus Medal is in the air right before the Goal Pole.