Site	What They've Got
The Official Boston Marathon Web site	Advice about training, registration, nutrition, and injuries, plus the official database of runners participating in the 103rd. Also includes information about the race's sponsor, the Boston Athletic Association.
John Hancock's Marathon site	Chock full of race-related information, including biographies of elite athletes when they're available. On race day the finish line timing and scoring will remain open until 6 p.m. (6 hours into the race.)
Hopkinton Athletic Association	Provides a countdown clock to the 103rd race, plus information about the town of Hopkinton, an FAQ about the marathon, and the answer to the question, "Why is the race run on Patriot's Day?"
Cool Running	One of the area's definitive running sites. Provides a photo map, with commentary, of every mile of the course from Hopkinton to Boston.
Heartbreak Hill Live!	This site features live images from Hearbreak Hill in streaming video; the faster your Internet connection, the faster the video stream. When you get to the homepage, click on Live Newton.
Runner's World Online	In addition to goodies like the shoe-finder and race time calculator, Runner's World did some good historical coverage of the 100th running, and cover the 103rd.
Road Runners Club of America	The country's largest grass roots running organization, RRCA features news, discussion forums, calendars, and a number of on-line publications about running.
Marathon Tours & Travel	In addition to sponsoring the burgeoning Antarctica Marathon, this Charlestown company provides information about available lodging for the Boston Marathon, along with the distances from the finish line.