As night and temperature fall, Kimberly Riggs crosses Puntilla Lake, lighting the trail with her Princeton Tec headlamp. pteclights . . . . . . . . . . . #iti2019 #iditarodtrailinvitational #iditarodtrail #alaska #adventure #fatbike #cycling #running #skiing #winterultra #adventure #winter #toughestrace #outdoors