From her opening tee shot until the final putt, Brooke Henderson had her foot on the gas pedal throughout her final round as she secured a historic victory at the Wascana Country Club in Regina.

Henderson fired a final round 65 to finish at 21-under-par, winning the 2018 CP Women's Open by three shots over American Angel Yin.

"Truly amazing, dream come true," said Henderson after becoming the first Canadian to win the national women's open since Jocelyne Bourassa in 1973.

The huge gallery surrounding the 18th green broke out into an impromptu rendition of “O Canada” just after Henderson's birdie putt dropped into the cup to seal the win. Henderson said the scene on 18 was something special, "I knew I had a couple-shot lead, but I knew it wasn't over yet. I had to hit a good shot in there, and then to hit it to three feet like that and to know that I finally did it, to hear the crowd chant my name, sing "O Canada," and to make that putt was awesome," she said.

This is the 20-year-old Smith Falls, Ontario product’s second win of the season on the LPGA Tour and her seventh overall, putting her just one back of tying Sandra Post for the most by a Canadian player in tour history.

It has been a difficult few months for the Henderson family as she lost both her maternal and paternal grandfathers, Robert Moir and Clem Henderson. Henderson showed plenty of emotion when speaking about what this win meant for her and her family.

"Just all the hard work that my family has put into this, my dad and my coach, my mom, my best supporter, and my sister, who's also my caddie. This was a big dream and a big goal for all of us, and I think it's just a cumulative effort of all of us that gave me the chance to be able to lift that," she said. "I thank God for this, for this win and just the many opportunities that I've been given. My grandfathers passed away this summer, and I really think they were helping me today."

The impact that this win will have on the sport around Canada won't be able to be measured for a few years, but it is already on the level of Mike Weir's win at the 2003 Masters Tournament.

Henderson said she hopes this win can be an inspiration for generations to come, "Just playing in this event, there were tons of juniors and tons of people out just to watch, and I feel like they were really motivated and inspired, and that's really all you can ask for," she said. "This win will definitely help grow the game in Canada, and that's a goal of mine, as well."

Throughout the round, Henderson never flinched. She started with a birdie on the first hole after firing a hybrid onto the green and draining the putt to get things rolling.

"I definitely wanted to get off to a fast start, it was a really great shot, I was really happy, and to make birdie there was huge to kind of settle me down a little bit," said Henderson after the round.

Despite making a bogey-five on the second hole, Henderson continued to push the pace, using her driver at every opportunity. She would birdie on the fifth and sixth holes, bogeyed the seventh and birdied the eighth to head to the back nine at 16-under-par.

The final nine holes are when Henderson really put the tournament out of reach. She birdied four straight holes from 12-15 and then stayed aggressive all the way to 18 where she almost holed out her second shot and drained a three-foot birdie putt for the win.

"On the back nine, I kind of found that zone, making five birdies and hitting it really close, hitting solid shots, really good drives on 17 and 18. I hadn't really found too many fairways on those two holes over the course of the week, but I did it today, which was just really important for confidence, and made the holes a lot easier," said Henderson.

She hit seven of 14 fairways and 15 of 18 greens in regulation during the round, needing just 27 putts to secure the win.

Two other Canadians made the cut with Alena Sharp finishing in a tie for 36th at six-under-par, while Anne-Catherine Tanguay came in tied for 46th at four-under. Click here for the full leaderboard.