In the fourth week of Fortnite Season 5 you’ll have to find a treasure in “Fortnite Battle Royale” again (Search Between A Gas Station, Soccer Pitch And Stunt Mount).
As with other weekly treasure challenges of this kind, you can go straight to the treasure, the exact location you see in the video below.
At the point in the video you can find the golden star symbol. Then finish the game or get killed to properly save the challenge. If you just leave the game without dying, it may not refresh the challenge. You can see everything under the Battle Pass challenges in the lobby. You need a Battle Pass for 1000 V-Bucks to unlock weekly challenges!
An overview of all challenges of the 4th week of Season 5 can be found here.
Treasure Location - Week 4, Pleasant Park
This guide was released before the challenges of week 4 are live. An update to this manual will follow shortly after the Challenges are going Live!
The place you are looking for is (presumably) south of Pleasant Park, we've already made a video about it before.