When 61-year-old GP John Pike set off for a hike on Scotlands Isle of Skye last year, he could never have predicted the battle for survival that lay ahead.

He crawled with a fractured hip up a mountain for nearly two miles and endured two nights of freezing temperatures with no shelter.

Rescue helicopters twice missed him “ and had it not been for a Facebook post seen by his 22-year-old nephew, Johns story could have had a very different ending.

His survival contrasts with the recent deaths of BBC presenter Michael Mosley and British teenager Jay Slater, who both went missing while walking on holiday.

The experiences of all three underline how dangerous venturing alone into unfamiliar terrain can be.

Peril in the blink of an eye

At about 7:30 GMT on 16 February last year, John set off from a B&B in Portree to begin a 15-mile (24km) hike from Sligachan to Loch Coriusk and back.

A keen walker from Bristol, he planned to spend the last day of his holiday completing the roughly eight-hour round trip.

The very flat terrain of the first six miles (10km) proved no issue on that Thursday morning and there was nobody around as he took photos of the unspoilt scenery.

But on the approach to Loch Coriusk, he came to a mountain pass “ a grassy bank punctuated by smooth black rocks that became slippery as it began to drizzle.

On the GPS device, it [the route] looked like a completely straight line, but it wasnt¦ theres no path, John said.

And I didnt like it at all. It was very, very difficult to follow.

As John walked over the rocks, he slipped in the flick of an eyelid and his hip hammered against the ground.

I was in a lot of pain immediately, he said. I thought this doesnt feel at all good, but I thought, ˜Its midday, Im going to have some lunch and then Ill let it settle down.

After trying and failing to stand up, John diagnosed himself with a hip fracture.

With no civilisation for miles and no signal on his phone, he decided his best option was to try to reach higher ground.

Over the next three hours, he scrambled on all fours for 1.8 miles (2.9 km) and eventually reached a position 577ft (176m) further up the mountain.

It was obviously painful and it was still quite a steep climb, he said.

When I got up there, I couldnt get signal there either and my GPS device was swinging all over the place. I thought, ˜I need to get back to the path.

John spent the next few hours sliding back down the mountain, passing goats that were the only sign of life he had seen all day.

With the temperature dipping to 1C overnight, John was left shivering in a foetal position. He soon realised that by shaking himself, he would generate more heat to keep warm.

I was panicking from the outset. I obviously realised I could die, John said.

I thought this is actually far worse for my family¦ at least I know that at the moment Im safe.

As a Christian, John said he had turned to prayer and later learned others had prayed for his survival too. He described feeling the sensation of a very close presence.

The search begins

The next morning, the landlord of the B&B raised the alarm when he realised John had failed to check out.

Police in Portree alerted their counterparts in Johns home city of Bristol, and Avon & Somerset officers went to interview his daughter.

She was able to tell them from Find My iPhone where Id last been seen [on the app], John said.

While rescuers now had a starting point, they were still searching an enormous area.

It was the discovery of a different digital footprint by Johns nephew on Friday that would prove to be the decisive moment in the rescue mission.

The day before setting out on the hike, John had posted on Facebook and taken a moment to reply to a friends comment about the trip.

What might have been a ordinary exchange on any other day became crucial information for police in narrowing the search area.

Facebook comment showing John replying to a friend to say that on his last day it was ˜a tossup between Raasay island and hiking along Glen Sligachan to Loch Coriusk and that he had a ˜slight preference for the hike.

More than 50 rescuers worked through Storm Otto on Friday, despite winds of 95mph (152km/h), sub-zero temperatures and snowfall.

Teams from the Kintail area, RAF Lossiemouth, Police Scotland Highlands and Islands Division, Search and Rescue Dog Association Southern Scotland, the Coastguard and Mallaig Lifeboat all aided the rescue effort.

Around 14:00 GMT that day, a helicopter had flown over the ridge above John before turning back on itself and flying away.

It was then that he realised all his clothes were black or navy, effectively camouflaging him against the dark rocks.

His hopes of being found were raised and dashed once more when a helicopter came back just before 18:00 GMT.

John waved a white linen bag in the air and blew his emergency whistle, but to no avail.

That really was a very low moment, he said. I thought, you know, Im 61, Ive had a good innings¦ If I do go now, Ive achieved a lot.

It was thinking about his daughter, a first-year university student who lived with and relied upon him greatly, that kept him going.

The rescue

While John continued to wonder whether help would ever come, rescuers had set out on Saturday morning to search an area where they now believed he was most likely to be found.

Ian Stewart, the first man from Skyes mountain rescue team to approach John, recalled the moment he heard his whistle.

We kind of stopped and then we radioed the RAF, who were the other team out, and said, ˜Did you blow a whistle?. They said, ˜No. And then we were listening for that whistle again, he said.

Then we heard it and we were trying to work out the direction it came from because as far as we were aware, there was nobody else on the hill.

One of the guys on our team who was very sharp-eyed, he spotted what he thought was movement quite close to the path.

Ian had not expected John to survive the storm but he was still breathing when the team sprinted over and found him curled up in a ball, indistinguishable from a rock in his dark clothing.

To find him alive when youre probably expecting to find a body, its a real buzz, Ian said. I was elated.

Scottish Mountain Rescue (SMR) said it was difficult to quantify Johns chances of survival, taking into account the length of time he had been missing and the weather.

Its statistician Jessica Steinemann said: Johns story is quite unique given the length of time he had been missing and exposed to the elements, the time of year this happened, and the storm that happened at the same time.

She said most missing people were found by SMR teams after one night outside, often uninjured and during the summer when a larger proportion of incidents were reported.

The majority of those involved in mountaineering accidents who were missing for multiple days did not survive their injuries, she said.

Johns story highlighted the importance of letting someone know where youre going, when youre expected to be back, and what people should do if you dont report to them, she added, noting the B&B owners raising of the alarm.

˜Incredibly lucky

Walking is key to the close relationship John enjoys with his brother Matthew (left)

When John heard of the recent disappearance of fellow doctor Michael Mosley, who had been walking alone on the Greek island of Symi, it brought his own experiences to mind.

It just makes me realise all over again just how incredibly lucky I am to be alive, he said.

There was an awful lot of criticism of Michael Mosley for going out for a walk without his mobile phone, for example, and in extreme heat. And I thought, ˜You guys give the man a break. Its very, very easy to be wise after the event.

Hes obviously a highly intelligent man. You know, if he cant get it right, what hope is there for anyone? And yet it just happens to people.

Johns advice to fellow hikers now? Leave a message in the front of your car on your dashboard saying where youve gone walking, as well as having told somebody¦ how long the walk is likely to last, he said.

Have another method of navigation¦ I would strongly recommend to people having a GPS device with a full scale map of the area that youre walking in.

Ian added: Just go with orange [clothing]. You look a little bit louder down the high street, but youre easy to find.

Anyone who finds themselves in need of assistance in the hills or outdoor spaces, or who is concerned for someone who has not returned from a walk, should call 999 and ask for the police and then mountain rescue. (BBC)