Hamilton's Road2Hope marathon and half-marathon happens Sunday. Organizers changed the race route this year to "minimize traffic impacts."

Here's what to expect as runners take over some local roads:

The northbound Red Hill Valley Parkway will be closed 8 a.m. to 1 p.m.

All accesses to the northbound Red Hill Valley Parkway from past Dartneall Road to the QEW will be closed at 7 a.m.

Expect delays on Centennial Parkway and Mud Street from 8 a.m. to 10 a.m.

Expect delays at Barton Street and Red Hill Valley Parkway, and also Beach Road to North Service Road by Confederation Park, where the finish line will be.

Here's a map that shows the route and which roads will be back open when. The Red Hill Expressway northbound will be open again at 1 p.m.

There will be detours or delays on HSR routes 2, 4, 11, 43 and 56. More information here.