Phillip Arnold Park (The Tapeworm and Parasite Trails) Professional Review and Guide
"Located in Royal Hills just above the old mining town turned Boeing industrial park, Renton’s Phillip Arnold Park is home to the infamous Tapeworm and Parasite Trails. Mountain bikers here ride through some of the most deceptively technical and physically challenging terrain in the area. Despite the fact that the Tapeworm and Parasite combine for less than 6 miles of trails and minimal elevation gain, this ride gives new meaning to the words tight, twisting, and narrow.
Packed into less than a couple of acres, the turns are almost too constricting for the standard turning radius of most mountain bikes, and the trails are so narrow that removing bar ends is a must—the average handlebar may not fit between the trees even without bar ends. Riders who don’t pay attention will get whacked in the head more than once by low-hanging branches. Due to the tight turns, building momentum is tough, making the short climbs, tangled roots, and man-made obstacles difficult to navigate. Trail surface: Singletrack."