Altra Olympus 6 vs Brooks Caldera 8

The Olympus 6 is the better trail shoe for runners who want maximum cushioning and a roomy, foot-shaped toe box over very long distances. The Caldera 8 is lighter and more agile, with a 6mm drop that spares the calves and Achilles, and reviewers praise its stability and grip on technical, steep terrain. Build quality is close: both use durable rubber outsoles, but the Olympus 6's Vibram Megagrip is the more proven compound on wet rock. Owners rate the Olympus 6 highly, and Caldera 8 reviewers flag flat laces that come undone and sizing that runs a little big.

• Choose the Altra Olympus 6 if you want the plushest ride, a 0mm drop and the roomiest toe box for all-day trail ultras and hiking.
• Choose the Brooks Caldera 8 if you prefer a lighter shoe with a 6mm drop, a wide stable platform and strong grip on steep, technical descents.