Gilbert the Park City Moose is back for another adventure. After making his debut in Heidi Shadix-Pieros’s self-titled 2013 children’s book, where he toured Historic Main Street to find what became of his shedded antlers, Gilbert decided to hit Park City Mountain and Deer Valley in 2016 with “Gilbert the Park City Moose Learns How to Ski.” This time around Gilbert takes to the trails in “Gilbert the Park City Moose Goes Mountain Biking.” “I’ve …