He also holds the record for the Mount Evans Hill Climb in Colorado, which traverses the highest paved road in North America.

[5][7] In 2004, Danielson had an uneventful stint on the Italian UCI ProTeam Fassa Bortolo, missing the early spring campaign because of visa problems.

Following the Spanish races, Danielson finished thirty-first overall at the Volta ao Algarve, and a preseason best of twentieth overall at the Vuelta a Murcia.

However, after Murcia, Danielson's form deteriorated, finishing fifty-fifth overall at the Volta a Catalunya, forty-seventh at the GP Miguel Induráin, and eightieth overall at the Tour of the Basque Country.

Following the two American stage races, Danielson concluded the season with an eighty-sixth place at the Grand Prix Cycliste de Montréal.

After being unable to complete the Tour de Langkawi, Danielson returned to form during the Volta a Catalunya, where he finished twelfth overall, and second in the mountains classification.

The following month, Danielson returned to competition at the Tour of Utah, where he finished eleventh overall, and assisted with stage two's team time trial win.

After Utah, Danielson competed in the USA Pro Cycling Challenge, where he finished seventh overall, and by soloing up and over Independence Pass, won stage three.

After Catalunya, Danielson, however, was unable to complete the GP Miguel Induráin, but returned to form during the Tour of the Basque Country, where he finished eleventh overall.

[26] For 2015 cycling events, Danielson was sponsored by Cannondale, Full Speed Ahead (FSA), Icon Lasik, Mavic, Smith Optics, Prestige Imports, Vega Sport and Biotta.

[27][28] On January 20, 2015, actor Patrick Dempsey and Tom Danielson hosted a cycling event in Arizona called "Ride On, Tucson!"

[30] In a September 2012 online-forum post, Garmin–Sharp team manager and owner Jonathan Vaughters stated that Danielson had used blood doping products to increase oxygen delivery to his muscles.

[31] On October 10, 2012, the United States Anti-Doping Agency (USADA) announced that Danielson would be suspended for six months after admitting to doping during his time with Discovery Channel.

[2][38][39] After spending his childhood years in Connecticut, Danielson attended Fort Lewis College in Durango, Colorado.