Welcome to Kosterbrook Farm!

Nestled outside of Duvall, WA, Kosterbrook Farm is a haven for fluffy Finnsheep and a source of wonderful, all-natural wool. With a deep passion for sustainable practices, we raise our sheep with love and care, ensuring their happiness and well-being.

At Kosterbrook, the magic of wool comes to life. We offer a range of high-quality wool, fleece, and fiber, perfect for artisans, crafters, knitters, and anyone who cherishes the warmth and comfort of natural materials. We invite you to join us in celebrating the beauty of nature and the joy of working with wool – a gift from our beloved Finnsheep.

A ball of roving sitting on top of spun wool yarn.

Meet the Team

  • Stacy Lashbrook riding a horse in the arena on the farm

    Stacy Lashbrook

    Co-Founder & Chief Wool Officer

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  • Kolten Kosters mowing a field of grass to make hay

    Kolten Kosters

    Co-Founder & Chief Sustainability Officer

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From Around the Farm