For the past three years, Uncharted Lancaster has held an annual real-life treasure hunt involving hundreds of people that has given away $4,700 to a handful of participants while raising more than $10,000 for local nonprofits like the Historic Preservation Trust of Lancaster County (HPT).

This year, the tradition will continue with the Raiders of the Golden Osprey Adventure. The treasure hunt will kick off on Saturday, April 6, promising a five-week expedition, weekly cash prizes and the chance to win a share of $3,250.

Players will explore Lancaster and Lebanon counties over five weeks as they race to uncover the legendary Golden Osprey, a fictional treasure hidden more than two millennia ago by ancient Phoenician explorers who discovered the Susquehanna River. There will be rewards issued for first-, second- and third-place winners.

An honorable mention will go to the fourth-place team with the highest score on the leaderboard (and not among the first three Golden Osprey finders). All four teams will receive a full-size 3D printed commemorative Golden Osprey souvenir.

To play, participants must purchase a treasure diary; register a team beginning on Saturday, March 16; check Uncharted Lancaster's website every Saturday at 9:30 a.m. for that week's challenges; and solve the weekly riddles and decipher the clues to unlock segments of the treasure's GPS coordinates.

The Raiders of the Golden Osprey Adventure requires participants to utilize local history knowledge, puzzle-solving skills and the ability to navigate non-level terrain, making it a game of skill suitable for adventure enthusiasts of all ages.

Proceeds will benefit the HPT, with a portion from every treasure diary purchase going to the nonprofit. Funds going to HPT will contribute to its digital archiving project, which aims to scan the 160,000 artifact collection and preserve Lancaster County's architectural heritage.

For more information and to purchase a treasure diary, visit http://www.unchartedlancaster.com. Weekly clues will begin on April 6.