Tirop was again second to Kipyegon at the 2013 Kenyan Cross Country Championships and teamwork between the pair led to a Kenyan 1–2 and team title at the 2013 IAAF World Cross Country Championships – Kipyegon defended her title while Tirop was a narrow second to claim her first medal at the competition. She made progress on the track that year, setting personal bests of 8:39.13 minutes for the 3000 metres and 14:50.36 minutes for the 5000 metres, and also on the roads with a half marathon best of 71:57 minutes.