Dave Nash figures it will take 70 days to run across Canada.
Regardless how long it takes, however, the former boxer says he will reach the east coast because he believes strongly in the cause behind his run.
Nash, who lives in Guelph, Ont., decided to take on the challenge of running across Canada to promote awareness of the failings of Canada's family law systems.
He's not running for "fathers' rights," as some have suggested, but for the right of children to have consistent meaningful access to both their parents.
Nash passed through Kamloops Tuesday, having started his cross-country expedition in Victoria on June 1. He hopes his run will raise awareness and promote family law change, which he says is desperately needed in Canada.
"I'm doing this run so no other parent has to go through what I had to go through to stay involved in their children's lives," he said.
Nash wouldn't discuss his personal circumstances, saying a court order prevents him from talking about the custody battle with his ex-wife.
He did say, however, he now has a shared parenting arrangement with his ex with regard to his nine-year-old son and his 13-year-old daughter.
"Our courts are continually ripping children away from one of their parents," he said, advocating for shared parenting over the more traditional joint custody arrangements.
"(Joint custody) is not the same as shared parenting. How can you say a parent seeing their child for six days a month is in the best interest of the child?"
Nash said he's already received tremendous support for his effort, including from women. Not all those negatively affected by family law are men - 15 per cent of parents who are denied some or all access to their children are women.
"Most Canadians don't realize how bad the system is," he said.
Nash said running across Canada in 70 days would also set a Guinness Book world record. The current record is 72 days.
He hopes to average 75 or so kilometres a day, and has chosen a route he believes will get him to his goal just in time.
But Nash's knee is already sore. It's supported by a leg brace as he gets set to start Day 9 of his journey.
"I'm not built for running," he concedes. "I'm making it to St. John's (Nfld), this run is so important to get this message out."
Nash said people who want to learn more about what he is doing can visit his web site at www.crosscanadarunforthe children.com.