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Seafair triathlon to close I-90 express lanes Sunday, July 21
The I-90 express lanes will be closed on Sunday morning across Mercer Island for the annual Seafair Triathlon.
The Olympic Route includes a bike route which goes all the way across Mercer Island from Seattle to E. Mercer Way. The Sprint Route runs over the express lanes to 74th Ave. S.
The first wave of racers are set to begin the event at Seward Park at 6:30 a.m. on July 21, with the final wave starting at 8:05 a.m.