We entered the clearing and stopped, breathing hard after snowshoeing through deep powder. All around us were tall pines, their dark boughs drooping low under the weight of icy whiteness. Light flakes fell steadily but silently, adding to the 30cm that had arrived over the previous few days. Without the crunch of our footsteps there was no sound at all. I removed my thick gloves to take a glug of water - I may have been in the coldest place in Switzerland but all this exercise had made me rather warm.
This was the so-called Siberia of Switzerland, a valley in the Swiss Jura, which earned its nickname in January 1987 when the weather station in the village of La Brevine recorded the country's lowest temperature: minus 41.8C. Such extremes are rare, but the valley's unusual micro-climate often produces lows around minus 15C and has dipped to minus 29C once this winter.
Rather than being a hindrance, however, La Brevine valley has learned to make the most of its Arctic conditions and unusual fame. A few years ago restaurants, hotels and shops in the valley's three villages got together to launch a "cold festival"- La Fete du Froid - to celebrate its frigid reputation and show visitors what benefits the cold can bring. So, today people will gather by the frozen Tailleres Lake - perfect for open-air ice-skating - for a day devoted to enjoying the valley's prime assets: some of the best snowshoeing and cross-country skiing trails in the country.
Intending to preview the festival, I arrived on a January morning under grey, snow-laden skies to see bleak fields of white spread out before me. It certainly felt like Siberia or, as my snowshoeing guide, Monique, described it, "like you're at the end of the world". Though it appeared isolated, the end of the world was just half an hour by bus from the city of Neuchatel, making for a surprisingly accessible foray into oblivion.
Just south of the French border, among the low-lying Jura mountains, this region is the less brazen sister of the more obviously spectacular Swiss Alps. Instead of dramatic peaks, there are undulating hills and high-altitude valleys - not so good for downhill skiing, but wonderfully suited to snowshoeing and cross-country. There's plenty of personality to discover amid the Swiss Jura's understated beauty, too, including a long association with the watchmaking industry in the town of La Chaux-de-Fonds, and a history of absinthe production around the Val-de-Travers. I might need to familiarise myself with the green fairy at some point during my trip.
However, even the coldest place in Switzerland isn't reliably cold, and the mercury was barely below freezing when I arrived in La Brevine. But I'd been lucky nonetheless - after a slow start to winter, the snow had finally descended in shovel-loads.
As I followed Monique into the hills above the valley we made fresh tracks in our snowshoes, the only other marks left by animals - the cloven hoof prints of a roe deer, the trail of a squirrel disappearing up a tree. At one point, we saw deer in the far distance, darting across the snow. "It's important not to disturb animals in the cold," said Monique, "they get exhausted running away."
Unlike the vast, flat valley, up here the landscape was a Jura-typical mix of forest and clearings created, Monique explained, by years of farming where patches of trees were cut down to give space for cattle to graze. She pointed out the different types of pine tree - the red had downwards-pointing cones; and the white pine, favoured as a snack by cows and therefore now rather depleted. We warmed up with bourgeon de sapin, a hot syrup drink made from pine needle buds, before descending through the trees to Tailleres lake, whose frozen surface was so laden with snow it looked like another field.
It's up to the owner of La Brevine's only sports shop - the aptly named Siberia Sports - to decide whether the ice is thick enough to skate on, and today it was deemed unsafe, so we skirted the edge and across snow-covered peat bogs to end our walk.
Over a hearty lunch at restaurant Chez Bichon, Jean-Maurice, the head of the Fete du Froid, explained that La Brevine's micro-climate is produced by its position at the lowest point of the valley. Under high-pressure conditions with no wind, "the cold stagnates here, it can't leave", he said. You could apply the same theory to building an igloo and he demonstrated by way of a quick sketch: if you create a dip in the snow by the entrance to the igloo, the cold will gather there instead of inside, making the igloo warmer.
It was a piece of advice I thankfully didn't need to use of that night, even though the temperature had fallen sharply. I was staying in the cosy, late 19th-century Auberge au Loup Blanc, where a glass of absinthe and a steak with local Bleuchatel cheese fuelled me for the next day's activity. In the morning chill I just had time to check out La Brevine's landmark - a thermometer plaque marking the weather station that registered that record low in 1987 - before joining my guide, Michael, to explore the cross-country ski trails.
After hiring skis at Siberia Sports, we set out across the valley, now lit by the beautiful, low sun. Though I'd skied before, I was quickly outshone by others gliding past. "It's all about balance," advised Michael, "and it should feel natural. It shouldn't be hard work."
Easy for him to say, I thought. Cross-country skiing comes naturally to those who live here because it's more than a pastime, it's a way of life - children ski to school. Each village organises its own annual race - La Brevine's February event is called La Siberienne, of course - and the region has produced numerous Olympic and world championship-level skiers.
It may not have come naturally to me, but I could appreciate the pleasure of gliding through the white, the sky mixing mauve and yellow into blue as the sun dipped low.
We stopped for a drink at Aux Berges d'Estailleres, a quirky fish restaurant stuffed with nautical paraphernalia, owned by the charismatic Gilles. A French-Italian former maitre d' of the QE2, who speaks five languages, he's now happily ensconced in this landlocked boat-restaurant halfway between a tiny village and a tinier hamlet. Why? I asked. He showed me his newly built veranda, a suntrap that looked out over the lake, and gestured to the snow and blue sky outside. I needed no further explanation. "La vie est belle," I concluded, and he grinned in agreement.
It may be chilly in Switzerland's Siberia, but life here is beautiful.