Lycosidae
(Wolf Spiders)

Hi. his will be a challenge,but first hunch here is a burrowing wolf spider. Not many other features to work with, and just no certainty. The brilliant mouth parts are the best feature here, and not always consistent with Geolycosa wolf spider.
http://animalstime.com/wp-content/uploads/2012/12/wolf-spider-facts.jpg
Perhaps a decent ventral shot would solve this. Sadly, even the eyes are obscured, hat would at least confirm family.
Some you may compare to:
https://bugguide.net/node/view/127720/bgpage
Welcome to the site.