Mare managed third place at the Ras Al Khaimah Half Marathon in February 2011. Although she was the pre-race favourite at the Los Angeles Marathon in March, she was defeated by both Bezunesh Deba and Amy Hastings and came third with a comparatively slow time of 2:30:25 hours. A month later she won the Yangzhou Jianzhen International Half Marathon by a margin of one minute. She was the runner-up at the Bogota Half Marathon in August. Although she was not selected for the world championships team that year, she was chosen to represent her country at the 2011 All-Africa Games, where she won the half marathon gold medal in a Games record time of 1:10:47 hours. She improved her marathon best to 2:23:25 hours at the Toronto Waterfront Marathon in October, finishing as runner-up behind Koren Yal. A sixth-place finish followed at the Delhi Half Marathon.