"The other key thing that I probably missed more than I realised, when I was retired from professional sport, was just being a part of the team.
"I really enjoy that side of things as well."
Parore has been documenting his latest mission in a series of posts on his blog and via social media.
He has a small team with him, including several Nepalese sherpas.
Photographs show he is in good spirits, despite the rugged terrain - which he called unforgiving and brutal.
Earlier this year, he shared how much he had always wanted to take on the challenge of climbing the second-highest peak in the world.
"Even before I began climbing, it was always K2 - the ultimate challenge. And for me, anything worth doing is worth doing as well as you can,'' he wrote on his blog.
"As with everything I do, it begins as an impossible dream - not quite a fantasy, but certainly worthy of sniggers from those around you, if ever your aspiration was disclosed.''
The team is expected to be back in early August.
**To follow Adam's journey, visit: Adam Parore