the invention relates generally to a covering system for athletic courses . a movable framework straddles the athletic course and serves as a support for a cover . inside , lighting and climate may be controlled . also , possibly as a training aid or to facilitate competitive events , a timing system and / or pa system may be incorporated . among the possible athletic courses suitable for covering are running courses , in - line skating courses , cycling courses , etc . the invention also includes a method of operating an outdoor exercise course .