Sandals are much more comfortable than thick boots if you're going on a more or less even path. This means that rocky, slippery, and/or uneven trails shouldn't be hiked in sandals because they have less grip on the surface. However, if it's not a difficult path you can easily go with sandals.

Whether it is "OK" depends entirely on the type of sandal and the type of trail. You should never hike in "fashion" sandals or flip-flops, as they lack traction and support. However, specialized hiking sandals (from brands like Chaco, Teva, or Bedrock) are popular in 2026 for well-maintained, relatively flat trails in warm weather. They offer excellent breathability and are perfect for routes with multiple water crossings since they dry quickly. The main drawbacks are a lack of ankle support and the exposure of your toes to sharp rocks, thorns, or snakes. For rugged, steep, or "scree-filled" mountain terrain, most experts still recommend a sturdy hiking boot or trail runner to protect your feet and prevent sprains. If you do choose sandals, ensure they have a secure strap system and a high-traction Vibram or similar rubber sole.