Jeffery Clausen

It is with heavy hearts that we announce the passing of Jeffery Allen Clausen, age 46, on February 18th, 2025, near Missoula, MT. Jeff was born on September 3rd, 1978, in Great Falls, MT to Cheyl Dalla Mura and Brad Clausen. He joined the family as the second oldest child.

Jeff spent most of his life in Great Falls, MT and was well-known for his dedicated work in the oil industry, particularly at Calumet’s Great Falls Refinery. There he made lasting contributions and friendships during his many years of employment.

On June 17th, 2000, Jeff married Lynndsie Hamilton. This union brought Jeff his two sons, Tristan and Riley. Though their marriage has ended, they remained united in their love for their children.

Jeff's legacy will live on through his sons, who were the center of his world. He was a devoted father, sharing with them the passions that shaped his life—his love for music, hunting, and fishing. Jeff found great joy in passing down these hobbies, ensuring his sons knew the things that brought him joy.

Jeff will also be remembered for his unwavering support of his favorite bands. He found t-shirts with their logos to be appropriate attire for any occasion.

Jeff is survived by his mother Cheyl (Matt) Dala Mura, father Brad Clausen; siblings Jill Marzion, Jarrid Clausen, Janelle Clausen, and Dustin Dala Mura; sons Tristan (Tiffany Zarling) Clausen, Riley Clausen; Nieces and Nephews Joey and Dylan Marzion, Hailey, Hannah, Hayden and Harper Houle; and his cherished grand-daughter Amoura.

A celebration of Jeff's life will be held on February 25th, 2025, at 5:30 PM at Life of Heritage Inn, Great Falls, MT. We invite all who knew and loved Jeff to join us as we honor his memory and the impact he had on all our lives.