Mystic ― The Stonington and Groton police departments have announced temporary road closures for Sunday’s Mystic Half Marathon & 10K road races.

Police said people should expect traffic delays and road closures between 7 and 10 a.m. as 2,000 people compete in the two races.

“We will make every effort to limit these delays but please remain patient and exercise caution as there will be runners in the roadway,” police said.

Residents should expect delays at the following streets during these times:

· 6:45 to 7:10 a.m.: Coogan Boulevard (Route 27 to Clara Drive)

· 6:55 to 10 a.m.: Coogan Boulevard (Maritime Drive to Jerry Browne Road)

· 6:55 to 7:20 a.m.: Route 27 (Coogan Boulevard to Holmes Street); Holmes Street

· 7 to 7:30 a.m.: Route 1 (Holmes Street to Pearl Street); Pearl Street

·7:10 to 8:10 a.m.: Grove Avenue; River Road

· 7:20 to 8:25 a.m.: Route 27 (River Road to Jerry Browne Road) alternating one way traffic

· 7:30 to 10 a.m.: Jerry Browne Road (Route 27 to Mistuxet Avenue); Mistuxet Avenue.

· 7:40 to 10 a.m.: Pellegrino Road; Deans Mill Road; Pequot Trail (Deans Mill Road to Flanders Road); Flanders Road