Overview
Islas Marias is a cluster of Pacific islands 100 km off Nayarit's coast, unique for its transformation from a 20th-century federal prison (closed 2019) into a restricted tourism destination. The UNESCO Biosphere Reserve protects endemic species found nowhere else on Earth, while Puerto Balleto's Pueblo Magico designation highlights its cultural significance.
Beach · History · Island · Nature
Before you go
Accommodation
All-inclusive hostel-style rooms via reservation packages. Air-conditioned but minimally equipped. No independent booking possible.
Connectivity
No cell service. WiFi exists but only handles text messages. Plan to be disconnected during your stay.
Money
No ATM on island. Get Mexican pesos in San Blas or Mazatlan before boarding. Cash only for extras like bike rentals and beach drinks.
Rules
No food allowed on ferry. One 10 kg carry-on bag limit. Many areas require guided tours; independent hiking to some sites prohibited.
Safety
Very safe with Navy security presence. Standard outdoor precautions: sunblock, hat, sunglasses, season-appropriate clothing.
Transport
Ferry access only via pre-booked packages from San Blas or Mazatlan; Navy-operated boats. No independent access permitted.
Weather
Warm and dry most of year (30 degrees C average). Hottest April-June. Rainy July-September. Best visiting November-May.
