This segment of the Tolt Pipeline trail goes from Woodinville to Snoqualmie Valley. It includes the infamous "Hollywood (Heart Attack)" hill at the beginning of the route. There are several more steep climbs throughout the route. It is great for trail runners in the area who are looking to do some hill training but don't have the time to drive out to the mountains for a steep route.
This trail has had a lot of running on it, and anyone submitting an initial FKT on it should check Strava data from segment leaderboards and make sure that their time is actually the fastest known.