In March 2026, we - James Colliver and George Sinclair, serving Royal Marines - will attempt Project Mons 2.0.

A non-stop challenge to climb until we’ve gained the equivalent elevation of Olympus Mons, the tallest mountain in the solar system: 21,900m from base to peak.

This is our second attempt.

In October 2025, we attempted the challenge on Ben Nevis. Partway through, injury forced us to stop. It wasn't a lack of will or preparation - it was the reality that sometimes, no matter how committed you are, your body draws a hard line. Walking away unfinished was humbling and difficult, but that failure is the reason Project Mons 2.0 exists.

This challenge isn't just about physical endurance. It's about what happens after things go wrong - when plans fall apart, momentum is lost and you're left deciding whether to stop entirely or rebuild and go again. Recovery, resilience and the discipline to return are harder than the effort itself.

That journey closely mirrors the work of Millimetres 2 Mountains, who support people recovering from trauma, injury and major life setbacks. Through outdoor adventure and long-term mentorship, they help individuals rebuild confidence, regain direction, and take meaningful steps forward.

We're also proud to be raising funds for The Royal Marines Charity, who provide lifelong support to serving personnel, veterans and their families.

You’re currently on our Millimetres 2 Mountains fundraising page. If you’d also like to support The Royal Marines Charity, you can do so via our Royal Marines Charity fundraising page.

Both charities are doing vital work, and your support will make a real difference.