2019 potential first place payout: $30,000. Total potential payout is $85,000. The Williston Convention & Visitors Bureau in partnership with Lewis & Clark State Park are excited to host the 2019 Lewis & Clark Big 10 Showdown. This will be a two-day catch and release tournament held October 5-6. The tournament will pay out to 10 places, with prize money based on a full 100 team field. Entry fee per 2 person team is $1000.