The Christie Clinic Illinois Marathon races will affect the Champaign-Urbana MTD bus routes Friday and Saturday.

Reroutes will begin Friday around 6 p.m. and Saturday at the beginning of the service day, according to a press release from MTD. Friday’s reroutes are predicted to last a few hours, and it is uncertain when routes will return to normal Saturday.

MTD Marketing Director Jan Kijowski advises riders to create a MyRide account in order to receive texts or emails about specific route delays.

Friday’s service changes will affect several routes of: the 100 Yellow, 13 and 130 Silver, 22 and 220 Illini, the 5 and 50 Green and the northbound route of the 27 Air Bus to the Illinois Terminal.

All routes will be affected Saturday.

Specific information on which routes will be affected will be posted on MTD’s website in the next couple of days, Kijowski said.