Interior Dept. recommends changes to boundaries of six US national monuments
U.S. Interior Secretary Ryan Zinke rides a boat to Georges Island, while traveling for his National Monuments Review process, in Boston Harbor, Massachusetts, U.S., June 16, 2017. REUTERS/Brian Snyder

U.S. Interior Secretary Ryan Zinke has recommended that President Donald Trump change the boundaries of six national monuments designated by past administrations, according to a copy of the recommendations seen by Reuters.

The recommended changes include reductions already ordered by Trump to Utah's sprawling Bears Ears and Grand Staircase Escalante monuments, which have kicked off legal challenges by tribes and environmental groups.

The four other monuments are Cascade-Siskiyou in Oregon and California, Gold Butte in Nevada, and the Pacific Remote Islands and Rose Atoll marine national monuments, according to the document.

(Reporting by Valerie Volcovici; Editing by Richard Valdmanis and Jonathan Oatis)