DART is adding rail service for the 2021 State Fair of Texas. These schedules are effective from Monday, September 20 through Sunday, October 17, except for Saturday, October 9. DART will operate a special schedule for the Red River Showdown on Saturday, October 9. Schedules to be announced. The State Fair of Texas is open from Friday, September 24 through Sunday, October 17. Fair days are always busy days on DART Rail and buses. DART will make the following changes beginning Monday, September 20: Extra Green Line trains will run on a loop between downtown Dallas and Fair Park approximately every 10 minutes, from 9 a.m. to 6 p.m. daily; Orange Line extended to Parker Road on all trips, weekdays and weekends (except for Saturday, October 9); Trinity Railway Express (TRE) will operate on all four Sundays during the fair.