Castel Belfort, Medieval castle ruins in Spormaggiore, Italy.

Castel Belfort is a ruined castle above Spormaggiore in the Trentino, built from 1311 after Count Heinrich of Tyrol granted Tissone, son of Geremia I, the right to erect a tower. After a fire in 1670 the Saracini counts demolished the remains and rebuilt the complex as a 17th-century fortress. Consolidated in 2013, the ruins stand at 715 m above sea level.

Construction of the fortress began in 1311 after Count Heinrich of Tyrol granted permission to build a tower with supporting structures. A major fire in the 1670s severely damaged the original medieval building and changed its physical form.

The name Belfort is first documented with Tissone, son of Geremia I, who built the castle in 1311 after Count Heinrich of Tyrol granted him the right to erect a tower. The Saracini counts kept ownership until the 1990s, when the municipality of Spormaggiore bought the ruin; a conservation project completed in 2013 won the "Costruire il Trentino" award.

The site can be reached at no charge via SS421 road in Spormaggiore and is accessible on foot, with information available from the local tourism office. The location sits in hilly mountain terrain, so sturdy footwear and time for walking uphill should be planned.

The castle's name comes from the Saracini counts, who owned it when a fire destroyed it in 1670 and rebuilt it as a 17th-century fortress; the ruins visible today are largely that reconstruction, not the 1311 tower. The 2013 consolidation won the "Costruire il Trentino" award.