Rocking it! Elle Macpherson proves age is just a number as she poses in chic hiking gear while trekking through Utah canyons to celebrate her 55th birthday

She celebrated her 55th birthday on Friday.

And to mark the occasion, Elle Macpherson indulged her adventurous spirit by trekking the canyons of Utah while staying at the luxurious Amangiri resort.

Taking to Instagram on Saturday, the supermodel cut a youthful figure in a series of shared images taken inside a cave. 

Bucket list birthday! Elle Macpherson cuts an intrepid figure as she enjoys luxurious adventure vacation in Utah after celebrating turning 55

Bucket list birthday! Elle Macpherson cuts an intrepid figure as she enjoys luxurious adventure vacation in Utah after celebrating turning 55

Sporting a casual ensemble featuring a plaid shirt, navy body-warmer and cowboy hat, the mother-of-two struck a series of fashionable poses.

With her long locks in plaits, she captioning the post: 'Bucket list birthday - spent the day with Mother Nature marveling at her magnificence. Best birthday ever.'

On Sunday, Elle showcased her athletic prowess and slender figure on Instagram while scaling the side of a cliff in mountaineering equipment.  

Vogue: Sporting a casual ensemble featuring a plaid shirt, navy bodywarmer and cowboy hat, the mum-of-two struck a series of fashionable poses

Vogue: Sporting a casual ensemble featuring a plaid shirt, navy bodywarmer and cowboy hat, the mum-of-two struck a series of fashionable poses

Fearless: On Sunday, Elle showcased her athletic prowess and youthful figure in another series of Instagram pics as she was seen scaling the side of a cliff in mountaineering equipment
Fearless: On Sunday, Elle showcased her athletic prowess and youthful figure in another series of Instagram pics as she was seen scaling the side of a cliff in mountaineering equipment

Fearless: 

Elle, who earned the nickname 'The Body' in the '90s, is known for her age-defying physique, which she credits to 'good nutrition' and 'living alkaline'.

'The most important thing to me is how I feel,' she explained in the book The Game Changers.   

'I've found if my body is getting the nutrients it needs, then it shows on the outside - beauty from the inside out,' she said.  

Legendary: Elle, who earned the nickname 'The Body' in the '90s, is known for her age-defying physique, which she credits to 'good nutrition' and 'living alkaline. Seen here in Milan, September 2018

Legendary: Elle, who earned the nickname 'The Body' in the '90s, is known for her age-defying physique, which she credits to 'good nutrition' and 'living alkaline. Seen here in Milan, September 2018

The mother has been juggling her modelling career with raising her two sons Arpad Flynn, 21, and Aurelius Cy, 16.

And in a recent interview with Health and Wellbeing, Elle gushed parenting is the 'most rewarding experience' as she explained she takes on a very active role 'guiding' her children through life.

She elaborated: 'Parenting is the most rewarding experience and the gift that keeps on giving. I choose to guide my children, but ultimately it's their lives and their own journeys of learning.

Family ties: The mother has been juggling her modelling career with raising her two sons Arpad Flynn, 21, and Aurelius Cy, 16. Seen here with her youngest in London in 2013

Family ties: The mother has been juggling her modelling career with raising her two sons Arpad Flynn, 21, and Aurelius Cy, 16. Seen here with her youngest in London in 2013