On Sept. 23, 2017, Antonio (Tony) Robinson, an ultrarunner and off-duty firefighter from Monroe, Wash., was driving along Washington State Route 542 toward the majestic Mount Baker. He was with his wife, Cheryl, and their teenage sons, Gabe and Jon. Following them in a second car were Cheryl’s sister, Sarah, and her husband, Mike, their two young daughters, and Cheryl and Sarah’s father, Eric. Among the dense forest and glacier-fed rivers, Tony and his family shared pleasant memories of Cheryl’s mother, Susan, whose ashes they planned to scatter along her favourite hiking trail.
Tony was a runner. Starting in junior high, he ran cross country and the decathlon in college, moving up to the marathon in the early 1990s, ultimately getting his best time down to 3:08. He started running…