Nearly 500 people completed the obstacle courses on Saturday morning, aided by up to 80 volunteers.

Among those taking the challenge were Warrnambool's Rebecca Ross and Lisa Mordaunt, with their sons Bailey Ross and Cameron Stewart.

"Our sons are adults now but today was just about having fun with them in such a gorgeous location," Ms Mordaunt said. "It's so far out of our comfort zones."

Mr Ross, who just weeks ago finished his final school exam, said the challenge was "something to end the year off".

"You do everything with your mates, but you don't do everything with your family at this age," he said.

Ms Ross said she had lost her sister Jacinta Baulch to motor neurone disease five years earlier and she took the new challenge to "live life in her memory".

"That's been my striving force to take on any challenge and live life to the fullest," she said.

"I have lost 70 kilograms since she passed away."

Koroit Football Club president and organiser Steve Hoy said entrant numbers were up by about 80 this year.

"It's the opportunity to run through Tower Hill on some tracks that haven't been there before," Mr Hoy said.

"You might question their sanity, but they seem to enjoy it and it's great.

"There will be a lot of shoes thrown out."

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