WHEN the Western Bulldogs hit the track on Monday for the first full-list time trial of the pre-season, they were joined by squad members of a different variety.

A group of Victoria Police jumped in with the Dogs during the 3.2km run as part of their training for a fundraiser walk to raise money for a children's cancer charity.

Leading Senior Constable Craig Spicer from Footscray Police is one of 16 officers who will cover the 400km between Wodonga and Melbourne later this month in a bid to raise funds for "My Room".

"My Room" is a registered charity that was established in 1993 to support the cancer centre at the Royal Children's Hospital.

It began when three families, each touched by a child with cancer, set about raising funds for research and to improve the physical environment of the hospital's cancer ward, day chemotherapy unit and out-patient areas.

LSC Spicer, who is involved in the Bulldogs' community program, will walk for a young western suburbs child – eight-year-old Ronan - who is currently undergoing treatment for cancer at the Royal Children's Hospital.

Sgt Adrian Keltie said the walk, which begins on November 22, had received widespread support and would provide supporters a chance to donate to the cause.

"We're going to raise funds along the way. We've got some major sponsors like Silvers Circus, who are supplying a free circus for us on November 28 at Batman Avenue," he said.

"The band 'End of Fashion' are playing for us in Wodonga, playing a free concert for us on the Saturday night, November 22.

"We're also got Billy Brownless, Ben Dixon and Santo Cilauro doing a sportsmen's night for us on November 25 in Mansfield."

The group will pass through Victorian towns of Beechworth, Wangaratta, Benalla, Mansfield, Yea and Whittlesea before finishing at the Royal Children's Hospital in Flemington Road, Parkville, on November 28.

The Bulldogs' time trial saw the members pushed to the limit in trying to keep up with the players, with Sergeant Keltie managing to cross the line with skipper Brad Johnson.

"We were doing a bit of training with them today, but we couldn't keep up with the boys," he said.

"They were a bit too quick for us, a bit too professional.

"I crossed the line with Johnno, but I started halfway in … he's pretty fit!"