Dara first competed at the Winter X Games in Aspen 2012, and was the youngest female competitor. She followed this with a Bronze Medal in the 2012 Winter X Games in Tignes. As of 2019, Dara has won 4 medals at the Winter X Games. At the 2014 Winter Olympics Howell started competition as a gold medal threat together with compatriot Kaya Turski. Turski was favoured ahead of her but was sick on the day of competition and crashed out in both of her qualifying runs, failing to make the final. In the final Howell had a successful first run scoring a 94.2, a run and score which would hold up as the eventual gold medal winner. Kim Lamarre a fellow Canadian finished in third to complete another two medal event for Canada at those Olympics. Howell, like many of the Canadian women in freestyle competition was close to freestyle skier Sarah Burke, who died while on a training run a few years before the sport was inaugurated as an Olympic event. Burke had coached Howell at Momentum Ski Camps in Whistler Blackcomb. She dedicated her victory to Burke saying "Oh, my God. I don't know what to say. I can't believe it. It is so surreal and I am so happy to win a gold medal for Canada. I don't think it will hit me until later. It is truly amazing. There are a number of really good girls out there and I came out on top. This is the best moment in my entire life...I said it earlier this week, I hope a Canadian brings home a gold medal for Sarah. I can't believe it's me. It's totally for Sarah and I cannot believe it." Even though she was struggling with injuries and personal pressures after the 2014 Sochi Olympics, Dara still qualified and competed for Canada at the 2018 Olympic Winter Games in PyeongChang, South Korea. Dara's 2018/2019 was derailed by an injury at the Big AirWorld Cup in New Zealand, resulting in a torn anterior cruciate knee ligament. The injury required surgery, and Dara missed the rest of the season while she recovered. Dara returned to competition in November 2019 at the Modena Skipass World Cup in Modena, Italy. After finishing in first place after Qualifying, Dara took home the Bronze medal.
Personal
Howell was born in Huntsville, Ontario. She attended Tawingo College and Huntsville Public School, and graduated from Huntsville High School. She also has taken courses with VLC. Dara has an older brother named Brett. Dara shared publicly about the personal challenges she faced after winning a Gold Medal at the 2014 Olympic Winter Games.