Mark and Mady provide both cycling and walking tours. Their website is here. Walking is a pleasure here – there are so many trails and in Spain there are very rarely any dead ends. Walking in the summer months is not recommended – temperatures get very high, very quickly and the trend is to warmer and warmer summers. However, Spring, Winter and Autumn can be delightful here and I believe are the best times to visit – unless of course you are a real sun worshipper when you can be guaranteed uninterrupted sunshine. One point to note is that summer temperatures here can be very high but unlike the coasts, the humidity is low at this altitude.
Clear skies and lack of light pollution make the area around Montefrio a great spot for astronomy. A small village near Montefrio – Las Pedrizas is the site of the Andalucian observatory – see their website (Spanish). They often hold special viewing nights and have recently secured further funding from the government to maintain the facility.
Europe’s most southerly ski resort. Snow can persist till April even May. Ski in the morning swim in the afternoon! Mid week is much quieter in season – the resort and access to the resort can be very busy. The local IDEAL paper often has deals on hire and lessons check out their offer website (Spanish)