Prominent Lord Shiva Temples of Kumaon region in Uttarakhand
Kumaon is the land of Shiva devotees and so home to many Shiva Temples.
Jageshwar Temple Complex (36 kms from Almora) - Comprises a cluster of 124 large and small stone temples. Jageshwar is home to Monsoon Festival held Hindu month of Shravan (Aug-Sept). It is also home to a Mahashivratri Mela during Spring (Feb-March). Jageshwar is believed to be home of Nageshwar, one of the 12 Jyotirlinga Temples (However that claim is being contested by Nageshwar Temple near Dwarka in Gujarat).
Bageshwar (22 kms from Kausani) - Ancient temple complex dating back to 10th century AD.
Bhimtal / Mukteshwar (Near Nainital) - Bhimtal and Mukteshwar has a prominent Shiva temple each. Both have significant local significance and tourists to these destinations make sure they pay a visit.
Patal Bhubaneshwar (Visited from Vijaypur or Pithoragarh): It is a huge complex supposedly retrieved by Adi Shankaracharya in around 8th or 10th Century A.D. The entrance to Patal Bhubaneshwar is through a narrow cave that leads to a series of small halls. It is traditionally believed to be the abode of 30 million deities and is supposedly the replica of Patal Lok (the mythical underworld).
There many other temples that can be visited enroute such as Berinag.