It wasn't quite the treacherous elevation of Mt Everest, but biking up and down the Parihaka mountain bike park day-and-night for nearly 19 hours tested Whangārei mates Michael Lea and Jayden Hudson-Owen.
The ambitious adventure, which started at 8pm on Friday and ended about 2.30pm on Saturday, involved 2 kilometre laps up and down the park for a worthy cause close to their hearts.
Everesting for HeartKids is a 250km, 9000 vertical-metre challenge that takes up to 24 hours to complete.
The duo had raised $5400 by lunchtime yesterday but were waiting for a few sponsors to finalise their donations.
All proceeds will go to Heart Kids NZ— a not-for-profit organisation that provides support services to kids, teens and adults living with a childhood heart condition and their whānau.