SOUTH BEND — A series of college bicycling races will draw more than 200 riders into competition Saturday and Sunday. On Sunday, it will mean some closed-off streets and towed cars in downtown, plus a chance to watch the race.

The University of Notre Dame cycling team is organizing the event as a fundraiser for the Ara Parseghian Medical Research Foundation. College students will participate in the race, coming from throughout the Midwest. It will be an official Midwest Collegiate Cycling Conference event.

The Sunday race in downtown will be a "criterium," taking several laps around a fast one-kilometer course.

Car traffic will be blocked off — and cars towed — from 6 a.m. to 1:30 p.m. Sunday along the course on Michigan Street between Washington Street and Wayne Street, on Wayne between Michigan and Main Street, on Main between Wayne and Washington and on Washington between Main and Michigan.

One lane of car traffic will be allowed on Main.

Those races will begin at 8 a.m. Spectators are welcome. The start and finish line will be at the College Football Hall of Fame.

On Saturday, two races will be in the rural countryside, departing Greene Intermediate Center. Roads there won’t be blocked off, but motorists should be aware. Reserve officers of the county police will drive a lead car in front of each race.

A time-trial race will be 10 to 11:30 a.m. on a 9.9-mile loop on Roosevelt, Oak, New and Redwood roads.

Another road race will be on a 12.7-mile loop from noon to 5:30 p.m. following Roosevelt, Oak, New, Maple, Madison, Locust, Jackson, Johnson and Myrtle roads.

For more information, go to http://blogs.nd.edu/cyclingirish.