Grapevine-Colleyville is hosting the Rachel's Challenge 5K race on April 21, 2018, at Colleyville Heritage High School. The official 5K race is 3.1 miles, with official timing through No Limits Timing. The race begins at 8:00 a.m. for a fee of only $25. GCISD students and staff may participate for free. For more information on the Rachel's Challenge 5K, click here.