The weather is glorious, it’s the summer holiday season, and you have a week off.

So obviously, you spend it tackling a light 700-mile cycle around Wales.

But such ventures are nothing to new for Marie Tilley, merely another mountain to scale in her ongoing quest to raise funds for the Juvenile Diabetes Research Foundation.

So starting and finishing in her home town of Narberth, last August she completed the gruelling challenge with training partners Mark Reed and Neil Jenkins, as good friend Bethan Roberts accompanied them for support.

Ironically, the opening two days were plagued by heavy rain and brutal head winds, and the group were forced to dig deep on their opening leg to St Davids before heading for Cardigan.

But the weather soon improved, and for the six days that followed Marie and co tackled searing heat as places like Llangranog, Talybont, Anglesey, and Towyn formed stop off points.

One small crisis was overcome as Marie suffered a puncture, but her fellow riders were too focussed to notice.

"The support vehicle picked me up and drove me for a mile to where Mark and Neil were," she told Telegraph Sport.

"But when I commit to something I have to do it - so I rode back to where I had stopped and went from there. So 700 miles actually ended up as 702."

The last and eighth day incorporated a mere 79-mile ride from Llantwit Major to home, but for 10 of those, there were some special guests as Marie’s ‘mini’s’, a group of youngsters who she trains regularly along with her ‘marvels’ and misfits’, joined in.

“We were joined by people at certain points and it was great for the mini’s to come with us for a bit on the last day,” she said.

“And on top of the £2000 the ride raised, they made another £500 which was great.”

And fittingly, Marie and co re-entered Narberth in perfect sunshine.

“It was just brilliant,” she said.

“And now I’m looking at expanding it next year. I’d like to go around Scotland or Ireland or maybe somewhere abroad. England though, that may take a while.”

Indeed, the 39-year-old has no plans to stop her mission to help find a cure for diabetes, an issue close to her heart with her youngest son Marley a Type 1 diabetic.

Also in the summer, she led a group up Snowdon, and plans to expand that in 2019 to involve scaling Cadair Idris and Pen y Fan as well, and her ‘marvels’ group recently tackled the Cardiff Half Marathon. Both ventures helped take her total now raised for JDRF past £20,000.

Plans are also afoot for a host of other endurance events next year, and Marie admits she’s planning a 40th birthday next year that’s a tad more complex than your standard champagne and cake.

“I’d like to do something that hasn’t been done before and do it my way.”

It’s pretty likely she’ll think of something.