Glen Erin Golf Club is south of Janesville bordering the south side of the airport off I-39 at exit 177 then west.

The layout's fairways are generally roomy but bordered by trees, tall fescue grasses, and natural areas with a generous amount of conventional and pot bunkers along with waste areas. The greens are the most interesting feature of the course with most of them having significant slopes and contours that provide for multiple pin positions and prove difficult to negotiate on long putts. Also, the club utilizes four-foot flags (as opposed to the six or seven-foot flags found on most courses), which can initially make depth perception a bit tricky. It was designed by Greg Martin and tips out at 6,849 yards played to a par of 71, 72.4/126, course/slope ratings, it's 6,342 yards from the whites (70.3/121) and 5,786 yards (67.7/116) from the green tees.

The course lays on the Irish motif pretty thick; each hole has an Irish-sounding name and the tee markers are orange (tips), white (regular), and green (forward) in honor of the Irish national flag. The clubhouse is modeled after an Irish cottage and Guinness is poured liberally at the bar along with the very good, locally produced Gray’s beer.