Details: A lot of vacations feel like a sprint; these are literally marathons. By the end of this cruise, you'll have run a total of 26.2 miles, broken up into segments on the ships' decks and on roads and trails in different ports of call. The July 2013 Alaska cruise from Seattle is on Holland America's Westerdam with running/walking in Juneau, Sitka, Ketchikan and Victoria; rates start at $1,786 per person for an inside cabin. Participants on either cruise must also pay a race registration fee ranging from $249 to $279.