Floods close some roads and trails near Green, Snoqualmie Rivers + Many area rivers are in flood stages
The huge amount of rainfall across the region in recent days has sent several rivers into flood stages, including the Cedar, Green, Snoqualmie, South Fork Skykomish, Tolt and White Rivers as well as Issaquah Creek. Get updated information on the flooding from the King County Flood Warning Center, and track road closures via King County's My Commute map. There is also some significant flooding in Pierce County. I would avoid much of the Foothills Trail due to flooding on several waterways including the trail-adjacent South Prairie Creek.
Though these maps doesn't show trail closures, it's likely that trails near closed roadways would also be closed. If nothing else, it's best to stay away from flooding areas in general. The Snoqualmie River valley between Carnation and Fall City and the Green River valley between Auburn and Black Diamond are especially hard hit at the time of writing.
Though it is not listed on that map, the Green River Trail is closed through Fort Dent Park in Tukwila as the river is projected to reach Phase 3 flooding due to the huge amount of rainfall across the region in recent days, according to an email from the King County Department of Natural Resources (thanks for the tip Lee Lambert!). It's possible users will still be able to cross the river and connect to the Lake to Sound Trail or get to Starfire Way via the northeast parking lot (King County should consider leaving open the northeast gate between the parking lot and the trails), but I wouldn't count on it. It's really best to avoid the area. Nearby Interurban Ave S does have a sidewalk between Fort Dent Way and Riverside Casino, so that's probably a better option. If heading south, just don't turn after the casino, continuing on the sidewalk instead. You'll eventually reach Fort Dent Way, and the trail will be right there.
Map from King County DNR. It is definitely possible that other sections of the Green River Trail and other riverside trails will also be flooded. Please do not attempt to bike through flood water. Not only can the currents be stronger than you expect, but flood water can be really nasty and contain sewage or industrial grossness. It's not worth it.
If you encounter any flooded trails, let us know by emailing tom@seattlebikeblog.com or commenting below. Stay safe out there.