As the trail wound its way into Arizona's Sky Islands, the region's biodiversity was on full display, as were the threats from rising temperatures.

No doubt you've heard by now that regular old road running is a bore, a chore, a monotonous grind that turns your kneecaps into ticking time bombs. Well, the rumours are true. Welcome to your new ...

Smaller than the Epic version we tested earlier, but will still haul a substantial amount of gear and water - comfortably and securely ...