Visiting Irish jumps jockey Katie Walsh has endured a tough day at the office.

The sister of last year's Grand National Steeplechase winner Ruby, Walsh failed to complete the course in three of her four rides at Ballarat on Sunday.

Brought out to captain a team of Irish jockeys made up of expatriate riders, Walsh escaped injury in two falls in the two steeplechase races on the program that consisted of six jumps races.

Walsh came off the $2.10 favourite Fledged at the third fence in the Hygain Steeplechase while she was brought down at the last obstacle on $5.50 chance I'll'ava'alf in the Grand National Steeplechase won by Wells.

Her mount Nordic Duke failed to finish in the maiden hurdle while Black Tie failed to beat a runner home in the other division of the maiden hurdle.

"That's horse racing," Walsh said.

"I was unlucky on Fledged. He half stepped into it and landed on top of the horse in front of him and I came off.

"I thought I'll'ava'alf travelled well everywhere and was going to win jumping the second last but he didn't quite see it out in the ground and was brought down at the last.

"It was a tough day but I'm walking out of it which is the main thing."

To rub salt into the wounds her team was beaten 32-12 in the Australia v Ireland Jockeys' Challenge conducted over three races on Sunday.