"Follow the treasure map found in Snobby Shores (Hard)" is one of the possible Weekly Challenges in Fortnite Battle Royale.
Snobby Shores Treasure Map
Solution
The area you are looking for is between Snobby Shores and Pleasant Park:
Rewards
- 10 Battle Stars
Strategy Guide/Tips
- You don't have to actually examine the treasure map in Snobby Shores, you can go straight to the location as indicated here.