
21. Basin and Range National Monument
> State: Nevada
> Date designated: 7/10/2015
> President: B. H. Obama
> Acreage: 704,000 acres
22. Mojave Trails National Monument
> State: California
> Date designated: 2/12/2016
> President: B. H. Obama
> Acreage: 1,600,000 acres

23. Sand to Snow National Monument
> State: California
> Date designated: 2/12/2016
> President: B. H. Obama
> Acreage: 154,000 acres
24. Northeast Canyons and Seamounts Marine National Monument
> State: Massachusetts
> Date designated: 9/15/2016
> President: B. H. Obama
> Acreage: 3,144,320 acres
25. Gold Butte National Monument
> State: Nevada
> Date designated: 12/28/2016
> President: B. H. Obama
> Acreage: 296,937 acres
26. Bears Ears National Monument
> State: Utah
> Date designated: 12/28/2016
> President: B. H. Obama
> Acreage: 1,350,000 acres