They believe the well holds the remains of the missing teens.

Maureen and Allan went missing on November 23, 1968. Decades later a coroner ruled foul play was most likely involved in their disappearance, but there was not enough evidence to lay charges.

Maureen's sister Lynette Butterworth spoke for over an hour about the case and hoped the protest would unite a fresh call for authorities to take action

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She said Saturday's protest was the first of many.

"We will keep pushing until the well is dug up, we will keep going," she said.

"It was a good turn out and it was good to see people come and talk about this, this is about prompting people's memories and filling in the gaps.

"This is what we have been trying to do."

Allan's brother Peter Whyte was also in attendance on the day.

"It's been over 50 years since my brother has gone missing, he went out one night and he has never been seen again," he said.

"We knew after a while something had happened to him, it's been way too long and something should have been done by now."

Mr Whyte hoped the strong turn-out on the day would help the call.

"I think the turn out today has just been fantastic and I am surprised this many people have come out here in support and I am wrapped," he said.

"This is fantastic to see these numbers, I hope we can get something out of this... our fingers are crossed."

Family members have long believed the well is among two sites that might reveal what happened to Maureen and Allan.

But authorities say there is not enough evidence to justify digging up the well, which now sits under the loungeroom of a weatherboard home.

Bendigo resident Cheryl Hayes said most people believe that the teens remains are in the well.

"I am roughly the same age as the kids when they went missing, same era, I have family connected to them and I just think that the right things should be done and the well should be dug up," she said.

"We can only hope that the well will be dug up in due time, you have higher powers and we need to convince police that it is the right thing to do.

"I really think that they know it is the right thing to do and I don't know why they don't do it."

Victoria Police told the Bendigo Advertiser in April that the investigation into Maureen and Allan's deaths remained ongoing.

A $1 million reward remains on offer for information relating to the disappearance of Maureen Braddy and Allan Whyte.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report at crimestoppersvic.com.au

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