Already completed (crossed out means I did it this year):

• Alki Trail
• Burke-Gilman Trail
• Cedar River Trail - this is no longer completely bike-able after Renton introduced a no-riding zone after some bikes hit and killed an elderly lady on a different trail, and people complained on this one.
• Elliot Bay Trail (Terminal 91 Bike Path)
• Duwamish Bikeway
• Marymoor connector trail
• Green River Trail
• King County Interurban Trail
• Sammamish River Trail
• Ship Canal Trail
• I-90 trail
• Centennial Trail* - Completed 10 MAY ‘12
• Issaquah-Preston Trail (formerly Issaquah Creek Trail)* - Completed 10 MAY ‘12
• Preston-Snoqualmie Trail (near Snoqualmie)* - Completed 10 MAY ‘12
• Chief Sealth Trail (near SoDo) - Completed 12 FEB ‘12

* Completed these three all in one ride: http://ridewithgps.com/routes/858794

To do:

• BPA Trail (Federal Way)
• Cushman Trail (Artondale, near Tukwila)
• Everett-Seattle Interurban - in all fairness, I have tried this three times, and gotten lost several times after 15 mi. Twice of those I was using a GPS. It’s widely recognised as being hard to follow.
• North Creek Trail (near Woodinville)
• Ruston Way Path (near Tacoma)
• Soos Creek Trail (south-east of Renton)