Every Tuesday from 5 – 10PM, pick up a mystery TRI-fecta selection voucher or pick your own three numbers. Hit them on any Harrah's Hoosier Park race on Tuesday’s card and win. Exact order pays out $50 and a box selection pays $25 on the spot. Simply present your winning voucher to Trackside Caesars Rewards to collect. Enter at Trackside Caesars Rewards.