Avid ultrarunner Jason Trimmer is combining his two passions to raise funds for the 2nd Castle Hill Scout Group.
The Glenhaven resident, who is also a trustee of the Castle Hill Scouts parent committee, will take part in a 100-kilometre race in the Blue Mountains for a chance to upgrade Scout hall facilities.
Mr Trimmer, 45, completed the North Face 100 run last year in 15:23.
"There was nothing like the majestic Blue Mountains — and the support of the crowd was fantastic," the program manager said.
"I chose to do the race again to raise funds because some of the elements in it apply to scouting."
His sons Ethan, 8, Luke, 10, and Jamie, 12, are fourth generation Scouts and Mr Trimmer says it's great for children.
He is hoping to raise $10,000 to go towards a wheelchair ramp for the Scout hall and upgrade its bathroom facilities.
His employer RF Industries in Seven Hills has donated $3000 towards the hall upgrade.
The ramp will benefit Baulkham Hills youth Scott Green, who struggles to get into the building.
Mr Trimmer says he hopes the upgrade will open the doors for more boys and girls with disabilities to join Scouts.
"Scouting is great for all children and it gives them outdoor and social skills that can help them throughout their lives," he said.
The North Face 100 is a 100-kilometre or 50-kilometre mapped race that starts in Katoomba on Saturday.
■ To support the 2nd Castle Hill Scouts Group, donate by searching for Jason Trimmer in http://mycause.com.au
■ Details: http://thenorthface100.com.au