When to Go
If you're a hiker, stick to the summer (June–September, especially July), when the weather is better and there's less chance of a serious snowfall—not to mention blizzards or lightning storms at high altitudes.
October, with comfortable daytime temperatures and chillier evenings, is ideal for enjoying the still-green Pyrenean meadows and valleys and hillside hunts for wild mushrooms. November brings colorful leaves, the last mushrooms, and the first frosts.
For skiing, come December–March. The green springtime thaw, mid-March–mid-April, is spectacular for skiing on the snowcaps and trout fishing or golfing on the verdant valley floors.
August is the only crowded month, when all of Europe is on summer vacation and the cooler highland air is at its best.