Alaska

Mountain Bike Trail Guide

Alaska Mountain Biking Trails
Alaska Backcountry Bike Tours
Mountain Biking in Alaska
Local trails from dirtworld.com
Local trails from MTBR
Alaska All Season Cycling
On and off-road biking in the Denali Highway area
The Arctic Bicycle Club in Anchorage
All about the Iditasport 'ultra-race'.
(See also this article by Dave Inwood)

The Milepost 2005: With Plan-a-Trip Map (Paperback).

Pound for pound and inch for inch, The Milepostis the most valuable piece of luggage you could include on a trip to Alaska and northwestern Canada, whether you're going by plane, car, bus, or bicycle. The maps are exceptional and the abundance of information remarkable, making this the most irreplaceable of guides for a trip up north.