Representing clients in Dayton, Lyon County, Carson City, Reno, and throughout Northern Nevada





At Walther Law Offices, we have the skills and experience you need in order for your business to grow and succeed, whether you have just opened the doors to your business or are working to grow your company. 

We handle a wide range of business law matters, including:

  • Commercial leases

  • Contract law

  • Sale agreements

  • Distribution agreements

  • Mergers/acquisitions

  • Non-compete agreements

  • Non-disclosure agreements

  • HR policies

  • Wage and hour law

  • Discrimination claim defense

Walther Law Offices is deeply knowledgeable about the unique conservation and public lands opportunities, as well as challenges, facing Nevada and the Western States. 

Our attorney has worked with non-profit conservation groups, ranchers, farmers, as well as members of Capitol Hill, government officials, and other stakeholders in regards to solutions to public lands and conservation issues facing the state of Nevada. 


If you are in the business of health care, you understand the increasingly complex and highly regulated legal environment health companies are facing today. From new regulations, and pending legislation, to daily compliance and licensure issues, our firm keeps up to date on the emerging legal obstacles facing your organization. 

At Walther Law, we help you with the following healthcare legal matters

  • Anti-kickback, Stark, Fraud, Waste and Abuse

  • Whistleblower and Qui Tam matters

  • ERISA Compliance

  • HIPAA and HITECH Compliance

  • Insurance contracts

  • Legislative Analysis

  • Legal Counsel Support 



When you have been charged with a serious crime, experienced legal representation could be the only thing standing between you and a lengthy jail sentence. At Walther Law, we have extensive experience in the field of criminal defense and have represented clients in a wide range of cases, including:

  • Drug crimes, DUI

  • Felonies & Misdemeanors

  • Sex crimes

  • Theft crimes

  • Violent crimes

  • Traffic offenses

  • Assault and battery, domestic violence charges


Estate planning is the process of establishing a plan detailing how property and assets will be handled. This is important to do as early as possible to give you peace of mind and know that your family and loved ones will be cared for.

We handle a wide range of estate planning matters, including:

  • Wills and trusts

  • Probate and estate administration

  • Last will and testament

  • Financial power of attorney

  • Healthcare power of attorney


Divorce and other types of family-related matter are difficult for everyone involved. At Walther Law Offices,  our priority is to provide our clients and their families with the level of support and dedication they deserve. Whether you are fighting for child custody or simply want to protect your assets during a divorce, we are here to help. 

A few of the areas we offer representation for include:

  • Guardianships

  • Divorce

  • Child custody

  • Alimony

  • Property division

  • Modifications

  • Paternity

  • Marital agreements



Tel: 775-246-7721

As a fourth generation Northern Nevadan, Mario Walther is no stranger to the unique beauty of this community. After graduating from the University of the Pacific, McGeorge and passing the Nevada Bar, Mario immediately began practicing law in Lyon County. While in law school, Mario served as the Student Bar Association President, and participated in many student associations including the Public Legal Services Society. 


Mario founded Walther Law Offices, after practicing in Lyon County and throughout Nevada for four years. During that time, he has handled criminal defense cases, business litigation, family law, and estate planning. Mario has taken hundreds of criminal cases ranging from minor traffic matters to murders. Mario firmly believes every client deserves fair, thorough representation, and treats each case with passion and integrity. 

During his practice, Mario has gained extensive knowledge of business law, and worked on matters from entity formation of all sizes and many industries, business transactions, to complex civil litigation. Mario strives to provide the same level of attention and sound guidance regardless of the size and complexity of the issues facing his business clients. 

In his spare time, Mario likes to fish, hunt, and explore the great outdoor opportunities Nevada offers. Mario volunteers a significant amount of his time to, and is passionate about natural resource and public lands issues affecting Nevada. 

Tel: 775-246-7721

Patrick was born and raised in Northern Nevada, where he attended Bishop Manogue High School and subsequently graduated from the University of Nevada, Reno.  Patrick is a descendant of the 102 Ranch and has deep ties to Big Canyon Ranch , where he spends a large amount of his time. With that, Patrick has established the work ethic and strong character that is illustrated in his performance in the practice of law.  Patrick has represented clients in numerous areas including probate, estate planning, criminal defense, family law, guardianship, tenant/landlord, personal injury, debt collection, contracts, quiet title actions, and real property issues.  No matter the issue, Patrick works closely with the client to provide diligent and caring representation to ensure the most favorable outcome.


In his free time, Patrick is found working on the ranch, roping and working horses, hunting, golfing, and spending time with his family and friends.

Tel: 775-246-7721

As a former civil deputy district attorney, Olga Walther joined the firm with valuable knowledge and experience handling numerous practice areas affecting Lyon County and Northern Nevada, including issues in land use planning, real property and real estate transactions, water rights, and public utilities issues. During her time at the County, Olga served as legal counsel to the planning department, working with staff, the planning commission, and the development community to help shape sound policies for our quickly growing community. This experience allowed Olga to work with and witness the unique challenges and opportunities Lyon County provides to new development and business growth. 


Olga also represented the county in the court appointment process of the public guardian to persons who have been declared incompetent or of limited capacity, and advised and represented the child support division of the District Attorney's Office in court master and district court proceedings. Olga's experience with guardianship issues led her to adopt a compassionate and patient approach to family issues, due to the sensitive and personal nature of the issues and significant repercussions of the final outcome. 


Prior her time at the County, Olga worked on healthcare legislation and advised on issues regarding government health programs, including Medicare, Medicaid, the Affordable Care Act, as well as other government health programs. Olga was a frequent recurring speaker on emerging health care compliance issues. 

Olga has a B.A. from the University of California San Diego, J.D. from University of the Pacific, McGeorge, and is licensed to practice law in the State of Nevada. 






15 Main Street, Dayton NV

Tel:  775-246-7721


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Disclaimer: the information on this website is for general information purposes only. Nothing on this site should be taken as legal advice for any individual case or situation. This information is not intended to create, and receipt or viewing does not constitute, an attorney-client relationship.