Mark Hughes

Visiting Assistant Professor


Administrative Law, Constitutional Law

Professional Biography

Mark Hughes is a visiting professor at the University of Denver Sturm College of Law and Executive Director of the public interest legal group, Two Rivers Institute.

After graduating from the University of Chicago (A.B. 1978), Professor Hughes served two years in the Peace Corps in Liberia, West Africa. After a year as a Visiting Research Specialist at the University of Illinois, he returned to University of Chicago for his law degree (J.D. 1985). Professor Hughes came to Denver and then moved to Seattle with the international law firm, Gibson, Dunn & Crutcher, doing primarily product liability and commercial litigation.

Professor Hughes returned to Denver to join the Sierra Club Legal Defense Fund as a staff attorney. At the Legal Defense Fund, he brought a variety of pollution and public lands cases protecting endangered species, national parks, and the West’s rivers and streams. In 1992, he left the Legal Defense Fund to found Earthlaw, a grassroots-oriented environmental law group. Under his leadership, Earthlaw organized the College of Law’s first environmental law clinic. In 1998, Earthlaw opened the Earthlaw clinic at Stanford University.

Over the years, Professor Hughes has been at the forefront of public interest litigation. He has represented environmental groups in cases under the Endangered Species Act, the National Forest Management Act, the National Environmental Policy Act, the Wilderness Act, the Clean Air Act, Clean Water Act and a number of other environmental laws. He has also represented individuals and groups seeking to protect their Constitutional rights against government actions.

During a year’s sabbatical in 1999-2000, Professor Hughes took his spouse and three children on a backpack trip around the world. They are all still on speaking terms.

View CV


  • JD, Law, University of Chicago, 1985
  • AB, Botany/Biology, University of Chicago, 1978

Licensure / Accreditations

  • Fourth Circuit Admission 
  • Middle District of Florida
  • U.S. Supreme Court
  • District of Arizona
  • Central District of California
  • Northern District of California
  • District of Oregon
  • Eastern District of Washington
  • Western District of Washington
  • Ninth Circuit Admission
  • Washington State Bar License
  • Colorado State Bar License
  • District of Colorado
  • Tenth Circuit Admission