Hundreds of runners are in Halifax for the 13th-annual Blue Nose Marathon weekend.

The weekend kicked off Saturday morning with the youth run. The five-kilometre race is Saturday afternoon.

On Sunday runners will lace up their sneakers for the 10-kilometre, half-marathon and full marathon events.

A number of side streets are closed this weekend to accommodate the races, and several bus routes are being detoured. A full list of street closures for the weekend can be found here.