The value of farms, ranches, and rural real estate for sale in Summit County, Colorado, recently on Land.com was almost $621 million. This represents nearly 1,000 acres of ranches, farms, hunting land and other rural land and acreage for sale in Summit County. Summit County ranks 25th in the state for the total acreage of land currently advertised for sale. Of all farms and ranches for sale in Summit County, Breckenridge had the most land for sale. Based on its natural assets, Summit County's economy is dependent on tourism and recreation. Summit County is Colorado's 55th biggest county (619 square miles). It's located in the Northwest Colorado region of the state.