It is in the Palen/McCoy Wilderness, administered by the Bureau of Land Management.

[3] The mountains are entirely composed of Mesozoic granitic rocks.

A hiker's blog mentions Parkinsonia (palo verde) and Yucca.

[5] The Calflora database lists Brassica tournefortii (Saharan mustard), Crossidium squamiferum, Fouquieria splendens (ocotillo), Grimmia orbicularis, Juniperus californica (California juniper), and Stillingia spinulosa (broad leaved stillingia).

[6] One document notes that these mountains are part of the range for desert bighorn sheep (Ovis canadensis nelsoni).