Deliver a Semi Truck Fortnite seems difficult if you don't know where to look. Here's everything you need to know to complete this Fortnite Chapter 2 Season 4 challenge.
Deliver a Semi Truck Fortnite: How to Complete the Challenge
The XP Xtravanganza Week 4 challenge has you deliver a Semi Truck from outside Upstate New York to Stark Industries as the first part of five challenges. The challenge marker will bring you to the semi truck, just below the eastern ridge of Upstate New York. Now, you'll need to somehow get the truck over the cliff and into Stark Industries.
Rifts come to mind, but you shouldn't drive the truck into the Rift. It'll most likely break when you land, so you can't really use it to jump the cliff. Instead, drive clockwise around Upstate New York to find an area where the cliff slopes down. You can take the truck up there, and finally take it to Stark Industries.
You can also find semi trucks on the bridges that where separated by the Upstate New York land mass, which you can also drive around to sloped areas to get to Stark Industries. You'll want to make sure the tanks are filled up.
Stick around Stark Industries, as there are a few more challenges for you to complete before you can collect the 20,000 XP reward.