I decided to take a ride on Sunday over as much of the Tolt Pipeline Trail as I could. This pipeline is Seattle's secondary water supply and the primary supply for Bellevue and much of the eastside. Turned out to be a tougher ride than I expected as utility trails tend to cut straight across the landscape without regard for topography. Lot's of short steep climbs and descents. The scenery mostly consists of mini horse ranches and endless blackberries lining the right of way. Ended up with a 100km ride after a few detours due to private property.
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The easiest place to get on the Pipeline trail was about 14 miles into my ride where I was greeted with the 20% grade of Heart Attack Hill. No heart attacks here, but I did end up walking the bike up the last 50 ft or so after I lost traction in the loose gravel that I got into when avoiding blackberries.
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Once at the top, you start the ride of ridgeline to ridgeline - saw a couple groups of horseriders and quite a few folks out walking, but only 1 or 2 other bikes on this whole stretch. Fun except for the gates at the top and bottom of virtually every grade.
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I found out why my nav really didn't want to let me route from the western edge of the Pipeline Trail back to the Burke Gilman trail even though they are only separated by one last ridgeline. That last 500 ft drop is REALLY steep and choked with blackberries in the middle. Feeling tired and stubborn after 50 miles, I decided to hike the bike down on some switchback trails and an unofficial MTB trail that was showing on OpenMaps. Probably a dumb move but I did make it down the combination of trails to about 2/3 of the way down then was able to go straight down the -25% grade for the rest after getting past the choke point.
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