[2][3] At the 2011 All-Africa Games in Maputo she competed in both the 5,000 metres and an event completely new to her, the 3,000 metres steeplechase;[2] she placed fourth in her main event but won an unexpected gold in the steeplechase, running 10:00.50 and outkicking Ethiopia's Hiwot Ayalew to win Kenya's first athletics gold medal at the Games.

[3] She scored her first IAAF Diamond Race points with a third place at Weltklasse Zürich after Sofia Assefa, the original winner, was disqualified for a lane violation.

[9] In 2014, Jepkemoi's best race was at the Ostrava Golden Spike meeting, where she ran 9:22.58 and narrowly won ahead of Morocco's Salima Alami.

[3][11] Jepkemoi opened 2015 with a near-personal-best of 9:22.11 at the Doha Diamond League meeting, placing third behind Ethiopian runners Virginia Nyambura and Ayalew.

[13] Three days later she was runner-up to Nyambura at the British Grand Prix in Birmingham, her third consecutive Diamond Race points finish.