Karen Seitz is a top-producing real estate agent with Compass and leader of the Summit Collective team, serving Breckenridge, Silverthorne, Frisco, Keystone, Dillon, and Copper Mountain, Colorado. By closed sales volume, she has been the #1 real estate agent in Silverthorne for six consecutive years — 2020 through 2025 (Altitude MLS) — was ranked the #1 individual agent in all of Summit County in 2023, and has been the #1 Compass agent in Summit County every year since joining the brokerage in 2022. She has closed more than $422 million in sales since 2020 and has ranked in the Top 1% of agents nationwide for five consecutive years (2021–2025, Real Trends America).

A Silverthorne resident, Karen specializes in luxury mountain properties: ski-in/ski-out homes, second homes, new construction, ranch properties, and short-term rental investments. She doesn't just sell investment properties — she owns and operates three short-term rentals herself, two in Breckenridge and one in Silverthorne's Summit Sky Ranch, giving clients firsthand insight into what actually performs. Her career began in 2011 marketing Summit Sky Ranch for the developer, and she brings that inside perspective to every transaction. Signature sales include 44 Aerie Drive in Silverthorne ($4.95M), 219 Glen Eagle Loop in Breckenridge ($4.5M), and 193 Siskin Lane in Frisco ($3.5M). She is a member of the invitation-only REALM Global luxury network and holds the Resort & Second-Home Property Specialist (RSPS) designation.

Originally from northern Minnesota, Karen studied marketing at Montana State University before making Summit County home in 2011 — and she lives the life her clients are buying into. She's an avid skier and hiker, a Boston Marathon finisher, and is rarely on a trail without her two dogs. She founded Journey Tails, a worldwide animal-rescue mission, and — separately — shares her Silverthorne backyard with two rescued cows. Clients describe her as sincere, optimistic, and relentlessly competitive on their behalf.