About Cassie Dellwo

Cassie is one of the founding members of Five Valleys Law, P.L.L.C. Being raised in the Mission Valley, she grew up with an agricultural background and has a special interest in working with farming and ranching families.  Her practice focuses on the areas of real estate, estate planning, and business law.  Cassie is a proponent of strong planning in life and business as she has witnessed how the use of good planning has blessed many of her clients and how the lack of planning has damaged clients (and friends).   

Prior to founding Five Valleys Law, P.L.L.C.  Cassie worked in North Dakota at a law firm practicing in the areas of foreclosure, bankruptcy, real estate, agricultural law, oil and gas, estate planning, business law, and litigation.  There she learned how to manage crisis and what to really watch for in contracts to avoid litigation traps.  Her past litigation experience has helped give her a keen eye for contract loopholes that would not be caught if she had not had the prior experience.  After nearly six years in North Dakota, Cassie returned to Montana to practice in a mid-sized firm in Missoula.  She continued practicing many of the same areas she practiced in North Dakota, but refined her estate planning and business law practice with the assistance of Five Valley Law co-founder, Paul Fickes.

In addition to her work in the office Cassie serves on the Western Montana Estate Planning Council - a group that focuses on ensuring its members have the most current and innovative ways to assist their clients.  She is currently the President of the group.  Cassie also serves as the Chair of the the Protection & Advocacy for Individuals with Mental Illness (PAIMI) Advisory Council and on the Board of Directors of Disability Rights Montana- working to advocate for the right of Montanan's with disabilities.  You can learn more about this group at https://www.disabilityrightsmt.org/. 

Outside of the office, Cassie can be found with her her husband and stepdaughter figuring out life.  Cassie especially enjoys time roaming the mountain side looking for huckleberries (if the season is right), golfing, or riding her bike.  However, most of her free time is dedicated to spending time with all of her family through out Western Montana.

Admission Details

  • 2012, North Dakota
  • 2011, U.S. District Court, District of Montana
  • 2011, Montana

Law School Attended

  • University of Montana School of Law, Class of 2011, J.D.

University Attended

  • Jamestown College, Class of 2008, B.A.

Associations & Memberships

  • Montana Bar Association
  • American Agriculture Law Association
  • National Academy of Elder Law Attorneys

Recent Blog Posts


  • Wouldn't Hesitate to Recommend Her

    Cassie is smart, professional, and one of the most competent attorneys I've had the pleasure of working with. She is reasonable and practical while advocating for her clients. She makes sound strategic decisions and is always well-prepared. I wouldn't hesitate to recommend her to clients, or to h...
  • Personable, Caring, Responsible and above all Professional

    We have been working with Cassie for years on so many different legal matters and she has been so personable, caring, responsible and above all professional and gets results. She has never left us hanging and although we have thrown her curve balls she continues to knock them out of the park! I t...
  • Dependable

    I have worked with Cassie on and off for years. She assists with my family ranch and business succession planning. The best part is she works well with all generations of my family.
  • Knows her clientele

    Based on my interactions with Cassie spanning almost 6 years, I've found her to be an excellent attorney with an enviable demeanor. Cassie knows her clientele - she actually takes the time to listen and answers questions in a way that is easy to understand. Very happy to have her on our side!
  • Client Recommends Cassie Dellwo

    The team at Five Valleys Law was incredibly passionate and extremely dedicated to providing me with the most impressive defense I could wish for. The team is refreshingly compassionate and nonjudgmental making it very easy and comfortable to be open with them about any and all details regardless ...
  • Anonymous Recommends Cassie Dellwo

    Cassie Dellwo is a good attorney and a caring person. I have used her services and am very happy with her work.
  • Peer Recommends Cassie Dellwo

    Ms. Dellwo is a top-flight attorney.
  • Absolutely amazing

    Tiffany and Cassie are absolutely amazing. They know are very knowledgeable!! 10 stars if I could. Will recommend to everyone.
  • Compassionate

    Cassie is a thorough and compassionate attorney who works very hard for her clients.