Updated
There are currently 2 condos for rent with a gym on HotPads in Montana State University.
Open the "All filters" tab, select "Condo" under "Property type", then select "Gym" under "Amenities". Select "Save search" to get an alert when a new match comes on the market in Montana State University.
This search shows rentals whose listing includes a fitness center, such as a shared gym in the building or the community. Check the listing details or ask the landlord about the hours and the equipment.