Grumetes Isla Martín García is a combined hostel and campground located on Isla Martín García, a small, ancient island rising from the Río de la Plata.

The facility — formally known as Hostal & Camping Escuela de Grumetes — is the island's only specialty lodging option and offers both tent camping and budget indoor accommodations. The island itself provides a rich backdrop for outdoor activities.

Kayaking and mountain biking excursions are organized through the Centro de Actividades Náuticas (CANE), and guided walks, birdwatching, night outings, and photography safaris are also available. A recently inaugurated, lit fishing pier serves anglers.

Each Easter week, the island hosts La Marea, an annual kayaking gathering drawing paddlers and instructors from across Argentina for clinics, safety training, and live music.