The Olympic Games are in full swing in China with "Athletics" events (the heading under which both long-distance running and track & field both fall) slated to begin this Friday, Aug. 15 and come to a close with the Men's Marathon on Sunday, Aug. 24. The Women's Marathon is scheduled for Sunday, Aug. 17. Click here to go directly to the Athletics full schedule.
Triathlon, has its own category with the Women's event slated for Monday, Aug. 18 and the Men's Tuesday, Aug. 19.
The above links take you to different areas of the official Beijing 2008 Olympics website.
You can also click here to go directly to the Yahoo!Sports listing of when various events are being televised.