Adventurer Andrew Skurka returned last September from a 4,679 mile hike, ski, and packraft around virtually the perimeter of Alaska. The trip took him through 8 national parks, over dozens of mountain ranges, and through some of Alaska's roughest and most scenic waterways. The guy is no joke, having finished the trip solo in 176 days (less than six months). Along the way Skurka kept tabs with us all over at his National Geographic Adventure Blog and Nat Geo wrapped up his trip with an article in the March 2011 issue. And he's definitely not new to trips like these, check out his rap sheet.See some amazing Nat Geo pics from Andrew's trip here and here.