The fourth annual Christie Clinic Illinois Marathon, a qualifier for the Boston Marathon, will begin at 7 a.m. on Saturday at First Street and St. Mary’s Road. Runners will trek through the flatlands of Champaign and Urbana before finishing at the 50-yard line of Memorial Stadium.

The half marathon and marathon relay will also begin at the same time and place.

According to the Illinois Marathon web site, the events call for about 100 more volunteers. Primarily, they need to fill volunteer spots on course teams.

Known for his feats of physical endurance, Marshall Ulrich will be the marathon’s special guest for the weekend. Having completed a transcontinental 3,000 mile run in 2008 and climbed he tallest summit on each continent, Ulrich will be speaking at each of the three Biaggi’s Pasta Feed, which are at 4:30 p.m., 5:45 p.m. and 7:15 p.m. on Friday. Tickets for pasta feeds are $15 for adults and $7 for children.

Registration for races is now closed, except for the 1-kilometer Youth Run. Participants can register for the Youth Race in person at the ARC from 4 to 8 p.m. Thursday, 9 a.m. to 8 p.m. Friday, or at the stadium from 11 a.m. to 2 p.m. on Saturday.