ACT chief health officer Kerryn Coleman granted an exemption for the Saturday morning event to run a six-week trial from October 31.

The return of the Saturday morning ritual came as a relief to Parkrun organiser Russell Crane, who said runners had only weeks from when bushfire smoke lifted to hit the tracks before lockdown hit.

He told The Canberra Times in May a return could be a long-way off as the UK-based organisation opted for a national-approach.

This was quickly scrapped in Australia as it became clear the pandemic was hitting some jurisdictions far worse than others.

Under Dr Coleman's restrictions anyone attending the five-kilometre runs at seven locations across Canberra must sign-in with the Check In CBR app.

"That gives us a contact tracing framework if there does happen to be an outbreak," Mr Crane said .

The pre-run briefing will be stripped back to the basics, providing just essential safety information to get runners moving as quick as possible. The tradition of an award ceremony will also be done away with to prevent a crowd gathering.

"We're going to go into the biggest open areas we can find so people don't have to crowd together when we're doing the briefings," Mr Crane said.

"People will be coming in, getting a quick brief and sent on their way."

Mr Crane said a crowd of up to 400 could be drawn at some spots but expected only a slither of that number would turn up in the initial weeks.

"It may not start out that large as people are getting used to it all," he said.

"It eventually will grow I guess but not to the stage where our areas are overwhelmed."

Coronavirus restrictions eased in the ACT last week to allow one person per two-square meteres outside, as opposed to one person per four-square meters as is still required indoors.

One month into the trial, Parkrun organisers will hand a report to Dr Coleman to review how it operated and if there were any areas of concern.