Crash Cove: Shortcut
Near the beginning of the track is a ramp with two fruit boxes at the end of it, just before a small lake. Stay to the right of the ramp and begin turning left toward the mountain once you pass the ramp. You will be driving through the lake. You will have to practice this, but it dips right before you would run into the mountain. As your head goes completely underwater, hold Jump. You will jump onto the shortcut and can pick up a box before jumping back down and rejoining the race near the bridge. You can begin your turn when you pass the single star on the ground just to the right of the ramp. You will be jumping onto the land that is connected to the bridge that you drive under which leads out to that boat to your right.
Turn left immediately after the first jump when you land in the water. Jump at the very left edge of this pond. You will land on a ledge which allows you to gain a second or two of time. This is very difficult to perform, and requires practice to get the correct. It is the only way to get the "T" on the Crash Cove CTR Challenge.