Triathlons are a challenge for Jessica Mepstead.

ALL Schools triathlete Jessica Mepstead is taking up the new challenge of competing in her longest triathlon on Saturday.

Jessica, 16, is the Hills Shire Times Junior Sports Star Award nominee this week.

The Galston High School student, who helped her school team win the senior schools girls division at the All Schools Triathlon Championships, will compete with the Hills Triathlon Club against other NSW athletics clubs on Saturday.

When her school’s girls team won gold on March 5 at the International Regatta Centre in Penrith Jessica’s teammate, Jess Shields, left the water in 12th place in a close pack. Then Jessica powered over the 15km cycle course in an impressive time of 28min 38sec to take her side up to seventh position.

In the third leg, runner Hanna Uebel coped with the pressure in the final leg to grab the Combined High Schools gold medal.

On the previous day Jessica won a silver medal in the Combined High Schools individual triathlon event.

After competing in the schools team event Jessica showed amazing endurance and completed the 600m swim, 16km cycle and 4km run in 59:32.

Jessica said she started competing in triathlons after school teacher Michelle Smidt encouraged her to try the sport.

“I’m looking forward to the triathlon this Saturday. It will be challenging because it is longer than any race I have done,” Jessica said.

“It’s a 1km swim, 30km bike and 8km run,” she said.

“It should be fun and interesting to see how I go.”

To train for the event Jessica has been swimming 3km to 5km three times a week; running 6km four times a week and cycling 20km a week.

She said her short-term goal was to compete in the Tri-NSW races which is a state competition.