Macalester’s math courses are listed at http://www.macalester.edu/academics/mscs/courses/
It looks like Macalester has regularly offered 18 math courses at the 300/400 level. However, that includes 2 in statistics and 1 that is typically listed as a CS (theory) course. Of the remaining 15, 11 are in what are typically called pure math (most commonly taken by pre-PhD students), and 4 are in what are typically called applied math. Only 4 of them are offered every year or semester, with the remaining ones offered every two years. Looks like 3 of them may cover graduate level topics, but that depends on the instructors’ choices.
Macalester has cross-registration agreements with some other schools, but apparently not with University of Minnesota, which would be the most likely place for a student to go to for additional or graduate level math offerings. See https://www.macalester.edu/registrar/schedules/actc/ .