The needles of pine trees turn brown from a variety of causes, but the primary one is lack of moisture.  Our extreme drought has most likely caused the browning of your trees.  Examine the trunk and needles of your pines for evidence of insects or fungus.  Lacking that, mulch under the trees and water thoroughly in the hope lack of moisture is the issue and that your trees will revive.  Unfortunately, however, your trees may not be able to overcome the lack of moisture and will die.  To consult a certified arborist to see if your trees can be revived, see https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional

You have beetles that are boring into your trees.  They are attracted to trees that are weakened as a result of drought or other pests or diseases.  I'm attaching links containing photos and descriptions of this problem.  The first link is from the U of Mn and talks about how to manage the damage.  Unfortunately, your trees are unlikely to survive this onslaught.

https://extension.umn.edu/forest-pests-and-diseases/managing-pine-bark-beetle-damage#management-strategies-1268062

https://news.extension.uconn.edu/2016/06/01/got-holes-in-your-trees/

https://news.extension.uconn.edu/2016/06/01/got-holes-in-your-trees/