Sheryl Powell, a California mother and hiker who vanished four days ago during a camping trip, was found alive Monday, her daughter and investigators announced.

Farrah Powell wrote on her Facebook page on Monday, “SHES ALIVE!!! This is the happiest day of our lives. We can’t thank everyone enough!!!!!!!” She included a picture of her mother surrounded by her family in the hospital in the post.

Sheryl Powell, 60, had been missing since Friday afternoon. Her husband, Joseph, told the Inyo County Sheriff's office she was last seen near the Grandview Campground, in the Ancient Bristlecone Pine Forest area of the White Mountains. He said she and their dog “vanished” from the California campground while he parked their vehicle.

The Inyo County Sherriff’s Office posted an update on their Facebook page on Monday afternoon writing, “Missing hiker, Sheryl Powell was located alive by ground search team members near the Montenegro Springs area (below where her dog was located earlier today).”

“Searchers describe her as resilient and strong but exhausted after being lost in an extremely remote area above Big Pine, CA.”

Powell was transported to a local for “medical clearance,” according to the post.

“We are beyond grateful for the continued support from her family, local residents, visitors, and the media,” the post from the sheriff’s office said. “We also cannot thank our assisting agencies enough for their amazingly hard work in difficult terrain throughout this 4-day search.”

MASSIVE SEARCH ON FOR CALIFORNIA WOMAN WHO VANISHED WITH HER DOG NEAR CAMPGROUND

Earlier on Monday, Farrah told Shepard Smith on “Shepard Smith Reporting” that she and her brother have been searching six miles a day on foot for their mother in a rescue operation that included dogs and a helicopter.

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“We've been tracking everything using different apps,” she said during a phone interview with Smith.  “We've given all of our tracks to search and rescue — covering areas that they haven't covered. We are doing everything we can out there.”

Fox News’ Nick Givas, Nicole Darrah and Mike Arroyo contributed to this report.