Updated

Five medals are at stake in track and field on Saturday at the London 2012 Olympics.

Five medals are on the line in track and field on Saturday at the London 2012 Olympics while 12 total events are taking place. The Olympic Stadium will be in use for events all day long starting at 5 a.m. ET, 10 a.m. local time, and going late into the night in London. The men's 20km race walk is the first track and field medal event of the day, while the men's 10,000m is the final medal event of the day.

All events are streaming live on NBCOlympics.com. NBC is showing live track and field coverage from 11:15 to 11:45 a.m. ET, from 1:30 p.m. to 2 p.m. and then once more from 4:15 to 5 p.m. on the east coast. NBC's primetime Olympics coverage will also feature delayed track and field events.

Schedule (all times ET)

Men's 100m

5 a.m. - Preliminaries
7:30 a.m. - Round 1

Women's Heptathlon

5:05 a.m. - Long Jump
6:40 a.m. - Javelin Throw
3:35 p.m. - 800m

Women's Pole Vault

5:20 a.m. - Qualification

Men's 400m

5:35 a.m. - Round 1

Women's 3000m Steeplechase

6:35 a.m. - Round 1

Men's 20km Race Walk

Noon - Final

Men's 400m Hurdles

2 p.m. - Semifinals

Women's Discus Throw

2:30 p.m. - Final

Women's 100m

2:35 p.m. - Semifinals
4:55 p.m. - Final

Men's Long Jump

2:55 p.m. - Final

Women's 400m

3:05 p.m. - Semifinals

Men's 10,000m

4:15 p.m. - Final

For more on the Olympics, check out SB Nation's London 2012 Olympics hub.