Horizon Mascot Party · Summer · August 13–20, 2026. This event has ended. Its seasonal reward is not currently claimable through this archived challenge.
Check the playlist guide →For the August 13–20 treasure clue, the reported chest location was around the garages at Shimanoyama Circuit in northeast Shimanoyama. A later treasure hunt in the same region can use a different chest.
Requirements
This page covers the Horizon Mascot Party Summer clue only. Compare the series and season on your event tile before following an old solution.
Step-by-step solution
For the archived clue, the existing location report points to the circuit garages. Activate the clue in the Festival Playlist before looking for its chest. Do not use this spot as a guaranteed answer for a future Shimanoyama hunt.
Reward
The official archive lists 100,000 Credits. An expired seasonal chest may be absent, even if you are at the right landmark.
Sources & further reading
Sources checked October 3, 2026. Location reports are credited to their authors; this guide does not claim firsthand playtesting. Header artwork is a decorative illustration.
Forza — Festival Playlist events and rewards Scene Gamers — August 13 chest location reportFrequently asked questions
Does this solve every Shimanoyama treasure hunt?
No. Region names repeat. This page is specifically the August 13–20, 2026 clue; match your event’s date before using the location.