Laguna San Rafael

The inflatable zodiac threaded between ice blocks the size of cars, and I sat in the bow with my hands in my lap because there was nothing to hold that would have been any use if we hit one. The pieces of ice that had calved from the San Rafael Glacier hours or days before were stranded in the lagoon at every angle, their surfaces grooved and crystalline, the parts underwater showing the blue that deep ice carries — not the blue of sky or sea but a blue that is its own specific frequency, something between teal and cobalt that doesn’t have a good name in Spanish or French or English. The glacier itself was two kilometres ahead of us. We were the smallest thing in the frame.

Laguna San Rafael sits inside the San Rafael National Park, a protected area of roughly 1.7 million hectares on Chile’s northern Patagonian coastline. The San Rafael Glacier is one of the northernmost tidewater glaciers in the world, descending from the Northern Patagonian Ice Field all the way to sea level, where it terminates in a wall of blue-white ice approximately seventy metres high and three kilometres wide. It has been retreating for decades, faster than the decades before that, and the ring of smaller lagoon that surrounds it holds the evidence of how far it has already gone: pale bands of exposed rock at the base of the surrounding mountains that were under ice within living memory.

We stayed at the glacier face for about an hour, engines off, drifting on the current that moves constantly outward from the ice. The sound environment was unlike anything I’ve experienced: absolute quiet interrupted at irregular intervals by groans and cracks that seemed to come from inside the ice itself, a geological complaint that translated into the occasional section of ice wall sheering off and plunging into the lagoon with an impact that sent a wave rolling outward and rocked the zodiac. After the first calving event I understood why the boat operator had positioned us at a respectful distance. After the second I understood why the respectful distance we were at was still maybe not respectful enough.

Between calving events, we drank whisky on the rocks — literally, with ice chips collected from the lagoon by the guide using a long-handled net. This felt like theater at first, the kind of thing that expedition operators include because it photographs well. But the ice, thousands of years old, was so dense that it melted at a fraction of the rate of ordinary ice, and the whisky it chilled was cold in a way that modern refrigeration doesn’t quite achieve. I thought about that for a while, about age and compression and what density means, while the glacier groaned and the sun crossed its face and the light on the ice changed from white to rose.

The flight back to Coyhaique was in a small prop plane that flew low along the Northern Ice Field’s edge, and the scale only really registered from the air: white and grey and crevassed as far as you could see in every direction, the glacier’s tongue a narrow blue-white ribbon descending toward the sea. From up there you could see exactly what was at stake.

When to go: Laguna San Rafael is accessible year-round by small plane from Coyhaique or by boat from Puerto Montt, but November through March offers the most stable flying weather and longer daylight hours. The lagoon is typically more choked with floating ice in summer after winter calving, which is both more dramatic and more logistically complex for navigation. Book well in advance — capacity is tightly controlled.