This is the incredible moment a heroic K9 Mercury found a missing 85-year-old woman who was clinging to a tree on a steep Colorado ravine.

Greenwood Village Police Department Officer Austin Speer and his four-legged partner, Mercury, a German Shorthaired Pointer, went searching through the woods after they received a report from family members about the missing elderly woman.

Video shows Officer Speer holding onto a very long leash following Mercury's lead as the dog guided him through the grassy trail.

The dog was sniffing and traveling at a hurried pace, as the officer spoke to him: 'Good boy buddy. My merky bud.'

When the officer and Mercury located the woman, she had been partially keeled over. The officer said, 'good Duke. Hi Ma'am,' as Mercury was all smiles standing next to her.

Greenwood Village Police Department Officer Austin Speer with his smiley K-9 Mercury who helped rescue the elderly woman who was lost 

When the officer and Mercury located the woman, she had been partially keeled over. The officer said, 'good Duke. Hi Ma'am,' as Mercury was all smiles standing next to her

Officer Speer reassured the woman that Mercury is a friendly dog. 'He found you. Is that good?' he asked. Then told her, we're going to get you home. okay?'

The woman who was coherent said, 'Good.'

According to the woman's daughter, her mother had tried to climb the hill before she ran out of steam and was unable to move, and was lost for two hours. 

She expressed how grateful she was for Mercury and Officer Speer's help in finding her mother calling it 'unbelievable.' 

'This is my mom and I am so grateful for Mercury and Officer Speer, the kind and professional dispatch gal I spoke with and all involved on this team effort to save my mom who was 'gassed out' after trying to climb this hill and unable to move,' she wrote. 

'I had been searching for her for two hours and Mercury and officer Speer found her in 10 minutes: UNBELIEVABLE! It was like watching a Navy Seal extraction: I am so grateful to live in City of Greenwood Village Government.'

The Greenwood Village Police Department said in a press release that K-9 Mercury, who joined the force a year and a half ago is 'trained in searching and tracking missing persons,' as well as narcotics detention.

'He tracked and found the missing woman clinging to a tree down a steep ravine where she could not be seen from the roadway or canal,' the department said.

Officer Speer reassured the woman that Mercury is a friendly dog. 'He found you. Is that good?' he asked. Then told her, we're going to get you home. okay?'

Mercury is a German Shorthaired Pointer who specializes in tracking and locating missing people and narcotics detention 

Partners Officer Austin Speer and his K9 Mercury, who joined the force 16-months ago 

The duo work together on training before Mercury's next assignment 

After the rescue, the woman was reunited with her family members, but the trio were sure to take a photo together.

The department expressed gratitude to Officer Speer and Mercury, with additional support from Corporal Brandon Runyan and Officer Roberto Moya, thanking them for keeping their 'community safe.'

Many people went to the police department's Facebook happy to hear the good news.

'Bless you Officer Speer and K-9 Merc. Great job finding this sweet lady,' one person wrote. 

Another said: 'So great to see a touching story with a happy ending!'