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American ultra marathon runner Camille Herron broke the 48-hour track record in Canberra, NSW at the Sri Chinmoy 48 hour Track Festival over the weekend.

She ran to 435.336 kilometres or 270.505 miles by completing 1088 laps on the 400 metre track at the Australian Institue of Sport.

The previous record was 411.458km or 155.668 miles set just six weeks ago by Britain’s Jo Zakrzewski in Taiwan.

The 41-year-old Herron also holds women’s world records at 50 miles, 100 miles and 24 hours.

On route she also broke the area record for North America when she surpassed 391.963km set by Marisa Lizak just two years ago.

100K splits

100km 8:49:41
200km 20:01:18 (11:11:37)
300km 31:07:42 (11:06:24)
400km 43:44:14 (12:40:32)

Herron is the first and only athlete to win all three of the road IAU World Championships for 50K, 100K, and 24 Hours. Her personal best in the marathon is 2:37:14. The Oklahoma native’s standalone 100K best time is 7:08:35.