Nameless Things by Ernest Jensen

SHIPS IN 5-10 BUSINESS DAYS. For fans of Stephen King and Nick Cutter, a gripping horror thriller set in Colorado's Devil’s Cup State Park where survival becomes a deadly game against subterranean terrors. In the aftermath of a painful breakup, Mike and his friend Wade seek solace in the remote beauty of Devil's Cup State Park, Colorado. Their quest for peace is abruptly ended when a meteor strike causes a rock to fall, trapping them and a diverse group of campers within the ancient volcanic caldera. As they grapple with their new reality, a far more sinister challenge emerges from the depths of the earth. The sanctuary they sought becomes a hunting ground as the group discovers the ground infested with lethal, flesh-piercing worms. The situation turns dire when they realize these predators are merely the heralds of something far more terrifying: the NAMELESS THINGS. With no way to call for help, survival hinges on their ability to outsmart the unseen terror lurking beneath their feet.