Just received from WSDOT, word of Highway 99 lane closures Saturday and a full northbound closure part of Sunday:
Contractor crews working for the Washington State Department of Transportation will reduce both directions of SR 99 to one lane on Saturday, June 9, so they can dig large sign foundations for the future SR 99 tunnel.
On Sunday, June 10, the Rock ‘n’ Roll Marathon will close all lanes of northbound SR 99 between the West Seattle Bridge and Green Lake, along with off-ramps on Interstate 5 and SR 520.
Saturday, June 9
3 a.m. to 5 p.m. – Northbound SR 99 traffic will be reduced to one lane between South Lander Street and Holgate Street.
3 a.m. to 10 p.m. – Southbound SR 99 traffic will be reduced to one lane between Holgate Street and South Lander Street.
Sunday, June 10
4:30 a.m. to 2:45 p.m.
All lanes and ramps of northbound SR 99 between South Spokane Street/West Seattle Bridge and West Green Lake Way will be closed.
6 to 11:15 a.m.
The northbound I-5 off-ramp to Lakeview Boulevard will be closed.
Two left turn lanes on the I-5 off-ramp to Mercer Street will be closed.
The westbound SR 520 off-ramp to Roanoke Street/Harvard Avenue will be closed.
Seattle city streets are also closing for the race.