Why Hike It

GR R2 is a short-calendar route with serious mountain character: steep ascents, dramatic cirques, and changing microclimates in one compact island crossing. For a hiker with 10 to 12 days available, it delivers a strong sense of expedition density without requiring remote resupply logistics.

It suits people who prefer structured overnight stops and clear stage planning. Daily effort is high, but accommodation and food rhythm through gites can make execution more predictable than a full wild-camping objective.

Trail Snapshot

• Distance: 130 km
• Typical duration: 10 days
• Difficulty: Hard
• Route style: Point-to-point
• Elevation gain: 9,500 m
• Primary accommodation: Gites and mountain huts

Highlights and Signature Sections

• Cirque de Mafate entries: Steep trails into isolated valleys with dramatic relief.
• Volcanic high ground sections: Distinct terrain around Piton de la Fournaise approaches.
• Cloud-forest connectors: Fast transitions between humid forest and exposed ridges.
• Cilaos area stages: A strong mid-route anchor for recovery and logistics reset.

Season Window

• Recommended months: May to October
• Typical pattern: Drier, cooler conditions in austral winter and shoulder periods.
• Practical note: Cyclone season (roughly December to March) can bring trail damage and closures.

Logistics: Food, Water, and Sleep

• Resupply: Usually tied to village or gite stops every 1 to 2 days.
• Water: Frequent natural sources but treatment is essential due to variable quality.
• Sleep setup: Pre-book gites in high-demand windows; tent options are limited and regulated.
• Strategy: Plan shorter days after big descent-ascent pairs to maintain consistency.

Difficulty by Region

• Northern cirque entries: Hard due to abrupt gradient and heat-humidity mix.
• Central spine transitions: Hardest cumulative fatigue section with repeated steep drops and climbs.
• Volcanic southern sectors: Technically simpler tread in parts, but exposure can increase effort.
• Final stages: Physically manageable only if hydration and recovery were strong earlier.

Permits and Rules

• Permit required: No
• Official source: https://www.reunion.fr/decouvrir/randonnee/les-gr-randonnees/
• Wild camping: Generally restricted; use designated accommodation and follow local protected-area rules.

Gear Watch

• Fast-drying clothing system: Frequent humidity shifts and rain bursts are common.
• Aggressive-grip footwear: Steep muddy descents demand stable traction.
• Pole setup for elevation cycles: Helps preserve knees on repeated large descents.
• Booking and cash plan: Some hut services are limited or timing-sensitive.

Hazards and Cautions

• Rapid weather shifts at elevation: Visibility and footing can deteriorate quickly.
• Slippery mud and wet rock: Major fall risk after rain.
• Heat plus humidity at lower levels: Can spike water needs even on shorter days.
• Trail interruptions after storms: Reroutes and delays are possible in damaged sectors.

First-Time Thru-Hiker Strategy

• Reserve key gites early, then build day plans around those fixed anchors.
• Keep day-1 pace conservative; steep gradients punish overfast starts.
• Carry enough treatment capacity to avoid water stress between known sources.
• Add one spare day in your leave block for weather or transport disruption.