What to Wear for an Arenal Volcano Hike
Footwear: the non-negotiable
The lava-rock trail is sharp and treacherous. A single misstep can cut your foot or turn your ankle. You must wear sturdy hiking boots with the following properties:
- Ankle support: High-cut, not low-cut. The rocks shift under your feet; you need lateral support.
- Stiff sole: A flexible sole flexes over the sharp rocks and transmits pressure to the arch of your foot. You want a sole stiff enough to bridge the gaps between rocks.
- Grippy tread: Rock can be slippery, especially if wet. Good traction matters on the descent.
- Breathability: Your feet will sweat in the humidity. Waterproof boots that do not breathe get clammy; try a breathable membrane (Gore-Tex) or accept some water in exchange for airflow.
Do not wear: sneakers, trail runners, sandals, or flip-flops. Guides see tourists attempt this every day and regret it within 20 minutes.
Rain gear
Arenal gets rain—often sudden and heavy. A lightweight waterproof rain jacket or a poncho is essential. A poncho is awkward on a rocky trail but keeps your backpack dry. A jacket is tighter and leaves your backpack exposed. Choose based on how much you care about your backpack. Waterproof pants are a luxury; if rain is heavy, your legs will get wet anyway, and quick-dry pants dry faster than soaked jeans. Read more about how to hike in rainy season if you are visiting May–November.
Sun protection
You can be rained on and sunburned in the same hour. The lava field has no shade; on a clear morning, UV exposure is intense. Bring a wide-brimmed hat (baseball caps do not protect the ears and neck). Apply sunscreen SPF 50+ before the walk and reapply after sweating or swimming. Even on cloudy days, UV penetrates. Sunglasses reduce glare off the rock, which will tire your eyes.
Layers and humidity
You will start the hike in semi-darkness, cool and humid. As the sun rises, heat builds, but the air stays humid. Wear layers: a thin long-sleeve shirt (UPF) or a moisture-wicking base layer, then a lightweight outer layer you can remove. Cotton holds sweat and gets cold; synthetic or merino wool dries faster. Bring a light fleece or windbreaker if you are sensitive to cold.
Socks
Wear mid-weight merino wool or synthetic hiking socks—not cotton. Cotton holds moisture and causes blisters. Bring a spare pair in your backpack; if your feet get soaked, changing socks mid-hike improves morale dramatically.
A typical packing list
- Sturdy hiking boots (broken in, tested before the trip)
- Moisture-wicking socks (wool or synthetic)
- Lightweight long-sleeve UPF shirt or rash guard
- Lightweight outer layer (fleece or wind jacket)
- Waterproof rain jacket or poncho
- Wide-brimmed hat (not a baseball cap)
- Sunglasses
- Sunscreen SPF 50+
- Small backpack with water (1–2 litres)
- Spare socks and a dry microfiber towel
- Phone and basic first aid (blister kit, pain relief)
Break in your boots before the trip. New boots on a lava-rock trail guarantee blisters. A 5–10 km walk on pavement two weeks before your trip is essential. If visiting in rainy season, pack extra socks and keep a dry change in your bag.
What you wear matters most on the lava field, where the rock is sharp and loose — see how difficult the hike really is and what the 1968 field is like underfoot.
Frequently asked questions
What shoes should you wear to hike Arenal Volcano?
Sturdy hiking boots with high ankle support and a stiff sole. Low-cut sneakers or sandals will result in ankle pain or injury on the sharp, uneven rock. Break them in before the trip.
Do you need rain gear at Arenal?
Yes. Rain is common in afternoons and unexpected in mornings. A waterproof rain jacket or poncho is essential. You can be rained on and sunburned in the same hour.
What is the best material for Arenal hike clothes?
Moisture-wicking synthetic or merino wool for base layers and socks. Avoid cotton. Bring layers because temperature and sun exposure change rapidly. UPF long sleeves reduce sunburn risk on the rock.