The Horse Heaven Round-Up Rodeo action starts at 7 p.m. tonight and it's Tough Enough to Wear Pink night. That means that for every person who attends the rodeo tonight that is wearing pink, the Benton Franklin Fair will donate $1 to the Tri-Cities Cancer Center and area hospitals to benefit members of our community battling breast cancer. The Horse Heaven Round-Up Rodeo is a big-time event and part of the Big 4 Rodeo Association, along with the Pendleton Round-Up, the Walla Walla Frontier Days Rodeo and the Lewiston Round-Up.