MARS is a Danish-developed, non-profit event management system for athletics competitions in Denmark. Created and maintained by volunteers, it is offered free to Danish athletics clubs and is designed by people involved in the sport for others who share their needs. The platform supports the organization and presentation of competitions, with listings of upcoming and completed events, venues, dates, and event information.

It also provides resources including competition formats, age-group categories for youth, senior, and masters athletes, and points tables. MARS maintains extensive records of past competitions, allowing users to explore historical events and results, and offers a demo option for prospective users. The site features a range of Danish athletics meetings, from club competitions and throws events to championships and indoor meets.

Organizers can publish event details and manage competition information, while participants and spectators can follow listings and results. MARS invites users to report website problems by email and explains that certain registration details may be retained to preserve historical documentation, such as results