Head to Castlewood State Park in Ballwin for an exciting summer Thursday night trail running experience hosted by the St. Louis Track Club, where you'll navigate singletrack, climb bluffs, and enjoy stunning views of the Meramec River. The series strategically schedules longer distances during peak daylight in July and shorter courses as evenings shorten in August to keep runners safe and make the most of summer conditions. St. Louis Track Club members save $10 off the full series or $2 per individual race when logged into RunSignUp with their membership email.