Ultimaas is also a member of MUSST, the Maastricht University Student Sport Trust, and SCOREN, their social branch.

Sports Council MUSST is the umbrella organisation for 24 Student Sports Associations with sports varying from Sailing to Soccer. The total number of members for all these associations is 1600. Within these associations, not only playing sports is important, but they organize all kind of activities and parties.

Sports Council MUSST supports these associations with subsidies, council and promotional efforts. Members of these associations can apply for subsidies with respect to the participation in tournaments.

Besides this, Sports Council MUSST organises all kind of events, within Maastricht and on national level. Examples are the Sportsweek, The Student Wintersport, The Batavierenrace and the Great Dutch Student Championships.