In the marathon, she holds a best time of 2:22:22 hours and has won major races in Rotterdam, Amsterdam and Osaka.

At the 2006 IAAF World Cross Country Championships she finished second in Japan, winning the silver medal.

Earlier, in February 2007, she competed at the Kenyan Cross Country Championships as an invited athlete and won the women's race, ahead of the elite among her former compatriots.

In the 5 km road race she ran the distance in 14:47, while she lowered her own record in the 10 miles of 50.54 by two seconds to 50.50 during the 2006 Dam tot Damloop,[7] which she also won in 2002.

[8] Kiplagat was ruled out for the whole of 2009 and returned to competition with a win at the Runner's World Zandvoort Circuit Run in March 2010.

[9] In September, she ran at the Dam tot Damloop and was the runner-up behind her niece Hilda Kibet, finishing with a time of 52:03.

Although she was far from the podium and failed to gain the World Championship qualifying time, she considered the race a success following her previous injury-ridden seasons.

[11] She improved at the 2011 Amsterdam Marathon, crossing the line after 2:25:52 hours to claim third place, the Dutch national title, and the 2012 Summer Olympics qualifying time.