After a number of people were injured last weekend at the Dirty Girls Mud Run fundraiser in Murillo, some participants say the course needs to be made safer.

Debbie Popien took part in the event, and said it was a lot of fun. But she felt organizers were overwhelmed and some details may have been overlooked.

'The one wall was scary.' - participant Debbie Popien

"There was no shade. No shade tents, and it was blazing hot,” she said.

“I don't know what the temperature was on Saturday, but it felt like it was 30 C.”

She noted some participants were hurt on a climbing wall, or while running through the muddy course.

"The one wall was scary, the climbing wall, because … there was a three-foot trench below it,” Popien said.

“If you fell, you didn't fall to the ground. You fell in a narrow trench and you kind of bounced against the wall. I think that's where a lot of people got hurt."

Popien said she knows of one person who broke a leg, and another who suffered a fractured wrist and finger.

"There were a lot of little trees, but they left them sticking out a little too much … maybe three or four inches,” Popien continued.

“If you didn't see it, or if it got covered in mud by the other people, you would trip over it."

A spokesperson for the Canadian Cancer Society, the beneficiary of the fundraiser, confirmed to CBC News there were eight injuries at the event in Murillo.

Spokesperson Maria Cabral said there were concerns about the climbing wall.

"So there were some injuries … and we have to thank the first responders for being on task."

Cabral said she hopes the event will be held again next year, but added the Cancer society will “learn from what happened” this year.