Hofbauer and Pidhoresky earned victories in the men's and women's races respectively at the 2019 Canadian Marathon Championships.

Hofbauer won the men's event for the second time in his career, with the 28-year-old achieving a personal best time of 2 hours, 9min and 51sec last October in Toronto.

The mark was under the 2:11.30 Olympic standard required.

Pidhoresky won the women's race in 2:29.03, with the 33-year-old dipping under the required Olympic standard of 2:29.30.

World Championship bronze medallist Dunfee secured a nomination after achieving a time of 3:49:00 in Japan last spring, one minute faster than the Olympic standard required for the men's 50km race walk event.

The athletes are the first three nominated by Athletics Canada for the Olympic Games in Tokyo, which will now take place from July 23 to August 5 next year due to the COVID-19 outbreak.

Confirmation of their places comes after the International Olympic Committee said that athletes who had qualified for Tokyo 2020 would maintain their spot, despite the delay caused by the coronavirus pandemic.

"There has been a lot of uncertainty surrounding these Games for the past few weeks and we're happy to put the focus on the outstanding achievements of our athletes today," said Simon Nathan, Athletics Canada's high performance director.

"With a new timeframe to work from, our athletes, coaches and staff have a new finish line to work towards and we are all looking forward to the time when we can get back on the track and the field and represent Canada.

"In the meantime, we will continue taking every precaution to keep our athletes, coaches and support staff safe and healthy."

Three other Canadian women have met the qualification standards for the Olympic marathon.

Malindi Elmore and Rachel Cliff have achieved times of 2:24:50 and 2:26.56, respectively, while Lyndsay Tessier secured a top-10 finish at last year's World Championships in Doha.

Athletics Canada have opted not to decide yet on the final two women's places.

"We can only select a maximum of two of these three talented women," Nathan said.

"With so much time before the Games and the additional possibility of other athletes qualifying, we decided not to nominate anyone else for the women's marathon at this time.

"However, we are supporting all three ladies through our CAPP funding programme.

"I know it is tough for them, but it is exciting for Canada to have so much talent to choose from."

Both the Tokyo 2020 marathon and race walk events are due to take place in Sapporo.

The events were moved north last year amid concerns over the heat in Tokyo during the Games.