She also won the 2014 IAAF Continental Cup and is a ten-time United States National Champion[6] winning the event in each of the years she competed (2011, 2012, 2014–2019, 2021, 2022).

She qualified for the 2012 London Olympic Games in the 3000-meters steeplechase, joined in the event by her University of Colorado teammate, Shalaya Kipp.

[16] Following the completion of her collegiate career, Coburn announced that she was becoming a professional runner and, in June 2013, signed a contract with New Balance.

[17][18] Shortly after, she announced that she had a sacral stress fracture that would cause her miss the 2013 Moscow World Championships and require her to sit out the 2013 professional track season.

One week later, on July 12 at the Glasgow Diamond League in Scotland, she broke Simpson's American record of 9:12.51 by running 9:11.42 and finishing second in the race to Ethiopian Hiwot Ayalew.

In 2016, Coburn opened her outdoor season running 4:06.92 in the 1500 meters at Hoka One One Middle Distance Classic hosted at Occidental College.

On December 2, 2016, Coburn announced on her Twitter account that she was ending training with coaches Heather Burroughs and Mark Wetmore after "an amazing 8 years."

[24] In January, Coburn, along with Sydney McLaughlin, Brenda Martinez, and Jenny Simpson set a world-best time of 10:40.31 in the Distance Medley Relay (DMR) at the 2017 New Balance Indoor Grand Prix at Boston's Reggie Lewis Center.

The previous best of 10:42.57 was run at this meeting in 2015 by the American team of Sarah Brown, Mahogany Jones, Megan Krumpoch, and Brenda Martinez.

[2] Four of the Kenyan-born women she beat in that race, including Olympic champion/world record holder Ruth Jebet had previously run faster than Coburn.

[2] In November 2017, Coburn was named the winner of the prestigious Jackie Joyner-Kersee Award given annually by USATF to the top female athlete of the year, their highest accolade.

[30] Coburn finished 3rd in the 3000 meters at the 2018 USA Indoor Track and Field Championships behind winner Shelby Houlihan and runner-up Katie Mackey.

On June 30, 2019, she ran 9:04.90 to place second behind world record-holder Beatrice Chepkoech in the steeplechase event at the Diamond League Prefontaine Classic held in Stanford, California.

[1] Coburn opened her 2020 season on January 25 at the New Balance Indoor Grand Prix, finishing third in the two-mile race in 9:32.81.

[34] At the postponed Tokyo Olympics she placed 14th in the final held on August 4, 2021; however, on the bell lap she clipped a barrier causing her to tumble off the track.

Coburn stated that perhaps the 10th title is her most favorite because it made up for a deeply disappointing performance at the Tokyo Olympic Games and because she was unsure how many more races she would be able to enjoy with her mother, who has been battling cancer.

[37] From July 16-20th, Coburn competed in her fifth World Athletics Championships held in Eugene, Oregon, finishing eighth in the 3000-meters steeplechase final in 9:16.49.

[39] On February 4, Coburn opened her 2023 season competing in the women's mile at the New Balance Indoor Grand Prix.

[citation needed] On February 18, she joined Team USA and traveled to Bathurst, Australia to participate in the World Cross Country Championships.

[42][43] While going over a water jump at the 2024 Shanghai Diamond League, Coburn sustained torn ligaments, damaged cartilage, and a fractured medial maleolus.

In October 2017, Coburn married her longtime boyfriend, Joe Bosshard, who had also begun coaching her earlier that year.

[57] Coburn founded the annual Elk Run 5k, a fundraising effort for the Crested Butte Cancer Support Community.