If you want visual aid with the trick skip the written section below and see the video linked at the bottom of this guide.

I Lighthouse Loop, you want to drive the rest of the track as normal, until you reach the Lighthouse section, you want to drive around the lighthouse drive onto the boosters onto the final straight of the track, there you want to turn around and drive onto the cliff slowly, glide down the cliff and braking if needed, drive onto those large rocks you see.

there you want to drive onto the 4th large boulder/rock, then start to drive up the cliff again, the polygon you drive onto should be shallow enough to drive up, you should see the leaves of a palm tree, aim for that tree as that is where you would want ot be after the cliff, aiming for the tree you should see a small ridge on the cliff drive over that small ridge to avoid an vertical polygon, after driving over the ridge aim slightly to the right of the tree for an easier path, if you follow the shallower polygons on the cliff you should be able to drive onto the grassy surface.

staying on that grassy surface drive toward the buildings near the track, don't go too close to the track and drive on the concrete surface near the buildings, take a path inbetween the track and the hills and cliffs.

further strategy is discussed in the video linked below: