The 41-year-old Armstrong retired in 2011. Armstrong won the Tour de France each year from 1999 to 2005, but USADA said those victories are now erased when it banned him.
Marathon officials said Armstrong didn’t formally register for the race, but noted that USADA’s ruling bars him from entering races sanctioned by USA Track & Field.
Lance Armstrong introduced himself as a seven-time Tour de France champion at a cancer conference Wednesday.
Armstrong, who retired a year ago, said Thursday that he would no longer challenge USADA. He denied again that he ever took banned substances in his career.
Never one to back away from a fight, Lance Armstrong is finally giving in and the cost of quitting is steep. His seven Tour de France titles could be gone as soon as Friday.
Armstrong has repeatedly denied doping. His lawsuit claimed USADA lacked jurisdiction and that its arbitration process violates his constitutional rights.
Lance Armstrong’s fight with U.S. anti-doping officials is going before a federal judge in Austin. He faces a lifetime ban from the sport and could be stripped of his titles if found guilty.
The World Anti-Doping Agency has urged cycling’s governing body to support United States anti-doping officials and provide documents to help their case against Lance Armstrong.
The motion, filed Thursday in Austin, Texas, cites the Ted Stevens Amateur Sports Act, which gives USADA jurisdiction over athletes who compete in Olympic sports.
Lance Armstrong’s supporters are turning to Capitol Hill for help after the U.S. Anti-Doping Agency has launched its own investigation of the cycling champion.
Lance Armstrong’s attorney says the United States Anti-Doping Agency has granted Armstrong a 30-day extension to answer doping charges
The seven-time Tour de France champion sued USADA on Monday in an attempt to prevent it from moving forward with charges that he used performance-enhancing drugs throughout much of his career.