In Alaska, the Rare Thrill of ‘Wild’ Ice Skating

I’d been waiting for months when I finally got the call from Alaska last March: Wild ice was on.A roughly two-week high-pressure window of cold and clear weather had frozen Portage Lake, the terminus of Portage Glacier, some 50 miles southeast of Anchorage, and it was solid enough to skate on its wild — or natural — ice.“Skating A-grade ice under a glacier really is a ‘take off work now and just go to it’ type of…