Silhouette Island: Hiking & History in Seychelles’ Untamed Wilderness

From the soft-sand buzz of Beau Vallon Beach on Mahé, the granite spine of Silhouette Island cuts the horizon like a dark fin. Come sunset, when the sun drops behind Mount Dauban and the channel turns amber, that silhouette feels close enough to swim for. But the island itself — third-largest granitic island in Seychelles, home to fewer than 150 permanent residents — operates on a different logic. There are no cars. No public roads. No resort strip. What Silhouette has is a tangle of rainforest trails, a French privateer’s buried treasure story, and a Marine National Park designation that keeps everything else out.

That isolation is the point. Designated a Marine National Park and often called the “Galapagos of the Indian Ocean” for its high level of endemism, Silhouette bans industrial development and large commercial projects outright. Visitors arrive by private boat or helicopter, then switch to foot travel. Hiking trails connect the main settlement of La Passe to wild beaches, old plantation sites, and the summit of Mount Dauban. If you’re after a day hike that feels like real exploration — not a signed nature loop — this is where you point your boots.

This guide covers the five experiences that define a day on Silhouette — from the summit push up Mount Dauban to the coastal snorkel at Anse Lascars and the plantation ruins that tell the island’s human story. Each section is built from on-the-ground logistics, trail stats, and the kind of practical detail that turns a good hike into a safe one.

The following five sections take you from the island’s summit to its shoreline, then into the stories carved into its granite.

Mount Dauban Summit — The High-Point Objective

Mount Dauban is the jagged centrepiece of Silhouette, a massif that rises to roughly 740 metres and dominates every view of the island from Mahé. The trail punches through dense native rainforest, crosses open granite slabs, and ends with sweeping panoramas over Seychelles’ inner islands and the Indian Ocean. This is the natural high-point objective for anyone who wants to earn the view, but the route is unverified as a legal, non-technical day hike — no guidebook-ready itinerary with confirmed access rules was available at the time of writing. Local guides are strongly recommended, and permission from the national park or resort may be required.

Best attempted during the dry season from May to October, when trails are firmer and the air is breathable. Sudden rain can make the granite surfaces slippery, and the dense forest holds humidity even on cooler days. Carry at least two litres of water, a rain layer, and sun protection. Guided treks typically range from €50 to €100 per person and include biodiversity insights that are easy to miss on your own.

Grand Barbe Traverse — The Classic Cross-Island Route

Grand Barbe is the documented mountain hike on Silhouette — a boat-assisted point-to-point traverse that covers 6.5 kilometres with 421 metres of total ascent. The route starts at Grand Barbe beach on the western coast, crosses mangrove and old plantation terrain, then climbs steep granite and forested slopes toward the interior before descending through rock, roots, and reservoir-side tracks to La Passe. The official SPGA-linked Hiking in Seychelles guide describes it as particularly challenging and recommends a veteran island guide.

The boat logistics are non-negotiable: you need to arrange a drop-off at Grand Barbe beach and a pick-up or self-navigation back to La Passe. Heat, open granite, poor footing, and route-finding are significant hazards. This is not a trail for a spontaneous afternoon — it requires a full-day commitment, a guide, and dry weather. The reward is the strongest day-hike representation of Silhouette’s wild interior that currently exists in published form.

Anse Mondon Trail — The Moderate Coastal Hike

Anse Mondon is the key shorter Silhouette hike — 3.2 kilometres out-and-back, moderate difficulty, roughly 1.5 hours of walking time. Starting from La Passe, the trail follows the beach north beyond the Hilton Seychelles Labriz Resort & Spa gardens to the marked national-park trailhead. It climbs through coconut forest, granite, and mixed woodland, passes a viewpoint over the beach below, then descends to the remote northern shore.

The beach itself is a long stretch of wild sand framed by granite boulders, with crashing surf on one side and calm, shallow pools on the other. It’s accessible only on foot from this side, which means you’ll have it quieter than almost any beach on Mahé. Great for a picnic stop, dramatic photos, or just sitting and watching the light change. Leaves, rocks, fallen branches, and humid heat can make the route feel tougher than the distance suggests — grippy shoes and water are essential.

Anse Lascars & Snorkelling — Sheltered Bay, Easy Access

Anse Lascars is a sheltered cove near the settlement of La Passe, where local boats land and the water stays calm. The walk from the village takes only a few minutes, making it the most accessible spot on the island for a swim or snorkel. The protected waters around Silhouette host healthy corals, rays, reef fish, and seasonal turtle activity — green turtles are regularly spotted here. Compared to the crowded snorkel sites on Mahé, Anse Lascars offers a hassle-free experience with fewer people in the water.

The Eco Center on the island offers structured diving courses for various levels, and the marine environment around Silhouette is part of the Marine National Park, so the reefs are in good shape. Snorkelling from the beach or by boat reveals colourful corals and fish, and the conditions suit all levels — beginners can wade in from the sand, while stronger swimmers can explore the headlands. Bring reef-safe sunscreen and a mask; there’s no gear rental on the beach itself.

Plantation Ruins & History — The Human Layer

Silhouette’s story isn’t just geological. Scattered across the island are relics of 19th-century copra plantations — old stone foundations, rusted machinery, and a small cemetery that reflects the colonial agricultural era. The remains are modest but evocative, and they’re often paired with explanations of current restoration work at the conservation centre near La Passe. The island also carries the legend of Jean Hodoul, an 18th-century French privateer whose rumoured buried treasure is said to remain hidden in the cave networks along the cliffs.

These sites don’t require a dedicated hike — you can visit them on foot from the village in under an hour. The conservation centre is worth a stop for context on the island’s endemic species and the breeding programmes for giant tortoises and the critically endangered Seychelles sheath-tailed bat. It adds a human counterpoint to the wilderness, grounding the landscape in the people who lived and worked here before the national park designation.

Getting There & Logistics — Access, Permits, and What to Pack

The biggest practical hurdle on Silhouette is simply arriving. There is no public ferry. Boat transfers from Bel Ombre jetty on Mahé take about 45 to 60 minutes and must be arranged privately — either through your accommodation or a hired skipper. Helicopter transfers are also available and offer aerial views of the island’s granite peaks and coral coastline, but they come at a premium. Booking ahead is essential, especially during the dry-season peak months of July and August when accommodation and transport prices spike.

Park entry fees run roughly €10 to €15 per person. Guided tours range from €50 to €100 depending on the route and group size. Once on the island, cash is preferred for smaller purchases — there are no ATMs and card acceptance is limited. The village of La Passe has a few basic shops, but supplies are limited; bring your own snacks, water, and any specific dietary needs.

Packing is straightforward but non-negotiable: sturdy hiking shoes with good grip, a rain layer, sun protection (hat, high-SPF sunscreen, sunglasses), insect repellent, and at least two litres of water per person for any walk longer than an hour. There are no shops or water fountains along the wilderness routes. A no-trace policy applies — everything you carry in must go back to La Passe for disposal.

Before You Go — Silhouette Island

How do I get from Mahé to Silhouette without a car?

Private boat charter or scenic helicopter flight. Boats depart from Bel Ombre jetty and take 45–60 minutes. Helicopter transfers can be arranged through accommodation providers. There is no public ferry service.

Can I hike independently, or do I need a guide?

Self-guided navigation is possible on marked trails like Anse Mondon, but the Grand Barbe traverse and any Mount Dauban summit attempt require a local guide — the official hiking guide recommends one for safety and route-finding. Guided hikes cost €50–€100 per person.

What’s the biggest risk visitors underestimate?

Trail conditions after rain. Granite slabs become extremely slippery, and sudden showers can arrive even during the dry season. Combined with heat, humidity, and no shops along the route, dehydration and a turned ankle are the most common problems. Carry more water than you think you need.

Is Silhouette worth it for non-hikers?

If you’re not planning to walk, the island’s appeal narrows significantly. The snorkelling at Anse Lascars is good, and the village has a quiet, unplugged atmosphere, but the main draw is the trail network. Non-hikers are usually better served by a day trip to Sainte Anne Marine Park or a beach day on Mahé.

When is the best time for hiking?

May to October — cooler temperatures, steady trade winds, and firm trails. November to April brings warmer, calmer seas for snorkelling but heavier rain and higher humidity that make hiking less comfortable and more hazardous on slick granite.

Wilderness on Its Own Terms

Jean Hodoul’s treasure is probably still hidden in those cliff caves, or maybe it was never there at all. But standing on the trail above Anse Mondon, looking back at a coast with no roads, no buildings, no engine noise — you start to understand what the real prize is. Silhouette Island protects something that most tourist economies can’t afford to: the choice to leave a place exactly as it is. That’s a different kind of treasure, and you don’t need a map to find it. For more on Mahé’s own mountain trails and how they compare, check out our guide to hiking Mahé’s granite peaks.

References

Nomad Lawyer. “Seychelles Promotes Ecological Conservation Across Mahé and Silhouette Island.” Nomad Lawyer, 2026. ↗

Take Your Backpack. “How to Visit Silhouette National Park.” Take Your Backpack, 2026. ↗

Must See Spots. “Silhouette Island: A Pristine Nature Reserve Experience.” Must See Spots, 2026. ↗

SPGA — Seychelles Parks and Gardens Authority. “Hiking in Seychelles.” SPGA, 2022. ↗

If Silhouette’s blend of hiking and conservation appeals to you, spend some time with our guides to Seychelles’ giant tortoises and coral reefs, the best wildlife encounters across the islands, and the top diving and snorkelling sites in the archipelago’s turquoise realm.