Blue Hills, MA The TARC Blue Hills Skyline Trail Run was held Saturday July 11, 2026. The Trail Animals Running Club's Skyline Trail Run "is a gnarly, old school 12K race with approximately 2,300 feet of climbing. The course is on the Blue Hills Reservation North & South Skyline Trail. The terrain is rocky and steep and will demand your attention, balance, and agility. In addition to epic staircase climbs and tumbling rock downhills, runners can expect a classic New England p