Can I climb Mt. Rinjani in sandals?

Climbing Rinjani in sandals is absolutely not advisable, and any reputable trekking company, including Lombok-Indonesia.org, would strongly discourage it. Sandals offer zero ankle support, no toe protection, and minimal grip, which makes them completely unsuitable for sharp volcanic rock, loose scree, and steep ascents. It’s honestly a terrible idea.

During the summit push, where temperatures drop near freezing and the ground is shifting volcanic gravel, sandals would expose your feet to cold, abrasion, and serious injury from kicked rocks. Your toes would be unprotected in an environment specifically designed to hurt them. The lower portions of the trail, while warmer, still involve uneven terrain, stream crossings, and root systems where an unprotected foot is vulnerable.

Even robust sport sandals with straps are inadequate because they don’t stabilize the ankle on lateral movements, and the open design lets ash and small stones accumulate underfoot, causing constant stops to clear them out. Guides on the mountain have seen trekkers attempt the route in inappropriate footwear, and the result is almost always blistered, bruised feet, slow progress, and an increased risk of falling behind the group.

Proper hiking boots are non-negotiable for a safe and enjoyable Rinjani experience. Save the sandals for the beach after you return. Your feet deserve better than sandals on a volcano.