All lanes of east and westbound SR 18 have reopened after being fully blocked near Tiger Mountain Summit on Friday morning.
According to State Trooper Rick Johnson, there was a semi vs. motorcycle collision. The passenger from the motorcycle has serious injuries. State Troopers are investigating the incident.
#Breaking EB SR 18 is completely blocked near Tiger Mt. summit due to a semi/motorcycle collision. Passenger from motorcycle has serious injuries. Witnesses advised the semi forced the motorcycle into the barrier. Updates to come.
— Trooper Rick Johnson (@wspd2pio) August 14, 2026
Emergency crews were on scene. Travelers should expect delays.
Issaquah-Hobart Road Southeast and city streets are not suitable for freight traffic, WSDOT reminded drivers.
The roadway was fully reopened by 10 a.m., WSDOT confirmed.
CLEARED: All lanes of EB SR 18 have reopened just west of Tiger Mountain Summit. https://t.co/8mld3ZmXpU
— WSDOT Traffic (@wsdot_traffic) August 14, 2026
©2026 Cox Media Group
