"XTERRA World Champs next wknd. I'm in! Looking fwd to racing,'' the seven-time Tour de France winner tweeted Sunday, a week before the XTERRA World Championships in Maui.
The seven time Tour de France champion finished 5th last month at the XTERRA USA Championship in Ogden, Utah.
After the Utah XTERRA Armstrong said, "It's a challenge. ... At 40 years old I guess I could have gone home, drank beer and played golf all day long. But it's good to come out and test yourself with these young guys and support a sport that I think is really cool."