Showing posts with label acclimatisation. Show all posts
Showing posts with label acclimatisation. Show all posts

Friday, February 10, 2023

Mt. Everest - Everest Base Camp

Starting out with an easy hike, I nearly missed the iconic yellow and red sign against a huge boulder simply stating "Way to Everest B.C." with a big red arrow beneath the words pointing towards base camp. At least I was certain I was on the right path.

After what felt like hours of trekking, the treacherous Khumbu Icefall loomed into view spilling its way down the valley between Everest and Nuptse. Khumbu Icefall sits at the head of Khumbu Glacier, a constantly moving sheet of compacted ice. As the glacier makes its way down the valley it fractures, creating deep crevasses that are always in motion and large towers of ice called seracs that are known to suddenly collapse.

Making the final ascent I arrived at the cairn adorned in prayer flags with its rudimentary sign signalling that I have arrived at Everest Base Camp (17,477ft/5,327m). It was located on a scree-covered section (loose broken stones) at the foot of Khumbu Icefall. I settled into one of the yellow tents and mentally prepared for the high altitude acclimatisation process I would begin to endure.

As sea-level dwellers our bodies are not designed to live at high altitude but we are certainly capable of adapting to it through appropriate acclimatisation. The higher we go, our bodies go through physiological changes by producing more red blood cells in order to carry more oxygen to our muscles and organs whilst combating the thinner air.

The acclimatisation process on Everest is lengthy taking up to a month and done by exposing the body to higher and higher altitude then descending to sleep, recover and overcome any signs of acute mountain sickness due to sudden changes in altitude.

High altitude sickness can affect any person regardless of fitness or age. Ignored or left untreated altitude sickness can have serious consequences including fatality by developing either into cerebral oedema or pulmonary oedema which is fluid build-up in the brain or lungs. Some of the immediate ways to treat altitude sickness is by taking specific medication, supplemental oxygen and/or descending.

During that month I climbed and returned to base camp three times with each climb going higher. It looked something like this:

1. Base camp to icefall, return to base camp. Have a day of rest.

2. Base camp across icefall to Camp 1 and stay; then Camp 2 return to Camp 1 for sleep; then Lohtse Face return to Camp 2 for sleep; and descend back to base camp. Have four days of rest.

3. Climb to Camp 1 and stay; then Camp 2 and rest the next day; then Camp 3 return to sleep at Camp 2; and descend back to base camp. Have five days of rest and wait for the right weather to summit.

The anticipation was over and the much awaited good-weather window presented itself for the final part of the expedition: Summitting Everest.

Starting in the wee hours of the morning, geared up and harness on I negotiated my way through the camp under the light of my headlamp to Crampon Point and attached my crampons to my boots.

Staring out at Khumbu Icefall with a good dose of mixed emotions I began the perilous yet now more familiar climb across. Crevasses were crossed on horizontal ladders and towering ice blocks on vertical ones. Some crevasses were so wide that more than one ladder had to be tied together to bridge the gap. For safety I was clipped into fixed lines. If I was to lose my footing on the ladders and fall the fixed lines would help break my fall. Climbs in some areas fluctuated between 20 to 60 degree angles but there was no time to dwell as the ongoing shifting and settling of the glacier and icefall was a constant reminder how unsafe the area was and moving quickly was necessary.

Several hours passed crossing the icefall till I made it to a large flat expanse of snow with more ladders to climb all the way to Camp 1. Situated at 19,390ft (5,910m), Camp 1 was in the middle of the Western Cwm (Cwm is Welsh for valley), a broad and flat glacial valley. From here I could see the Pumo Ri Mountain to the west and Lhotse Face straight up the valley. I then climbed on to Camp 2 about 1.74mi (2.8km) further up from Camp 1. Located at the base of a gully on scree, Camp 2 was well provisioned and is often considered as Advanced Base Camp. I stopped for a day of rest.

Early next morning I began making my way across the Western Cwm to the base of Lhotse Face where I had to cross a short ladder over a bergschrund (a deep crevasse where the steep slope meets the glacier). Lhotse Face is a 3,690ft (1,125m) glacial wall of blue ice. Sections of Lhotse Face average 40 degrees incline thereby needing to kick my crampon points into the ice to secure my footing. Throughout this climb I was clipped into a fixed line which was attached to the face with ice screws and anchors. I could feel the altitude change, my breathing labouring as I slowly and steadily climbed my way into Camp 3. I was now at 24,015ft (7,320m) gaining an elevation of 6,538ft (1,993m) from base camp. There were several camping spots here, essentially wherever one could find a flat spot to pitch a tent. I remained fixed to my safety line. The sun was up bestowing me with glorious views of the valley below, the peak of Pumo Ri and the others beyond.

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Monday, February 6, 2023

Mt. Everest - Pheriche

Leaving Namche Bazaar, the trail was wide and level following the curves of the Khumbu Yui Lha mountain. The mountain is 18,900ft (5,761m) above sea level and considered sacred by the Sherpa people. With the exception of one unsuccessful attempt in the 1980s, the mountain has never been climbed.


Winding my way up the trail, I could feel the climb in my legs as my muscles strained on sections of steep, stone steps then levelling out and just around the next bend it'd be another round of steep steps and on and on it went. Occasionally, I'd be rewarded with tiny peeks of Everest in the distance.

Suddenly, my trail began its descent to the valley floor and if I thought my muscles strained on the ascent, I now felt the strain on my knees during the descent. Reaching the village of Phungi Thenga, I traversed Dhudh Kosi river again and just as I made it into a gorge the trail took on another brutal ascent all the way to Tengboche. The highlight in the village is the Tengboche Monastery, a Tibetan Buddhist monastery for the Sherpa community. First built in 1916, the monastery has been destroyed and rebuilt a few times. Home to 60 monks, the prayer room is a kaleidoscope of colour with murals and paintings adorning the walls. A nunnery is a short trek away in Deboche.

Tengboche is beautifully located with its panoramic views of several peaks but the most outstanding was Ama Dablam and its imposing 22,349ft (6,812m) peak. Flanked by long ridges and a hanging glacier, it was first climbed in 1961 and it is the third most popular Himalayan peak for climbing.


The constant up and down trekking seemed a little self-defeating until I realised that since Lukla, I was an extra 3,280ft (1,000m) above sea level. I couldn't ponder that for long as down into the valley I went again to cross c river, a tributary of Dhudh Kosi.


Once I crossed the river, I left the woodland behind. The trail from here was in the open, no more trees in the way of my view presenting me with the enormity of this place. Up and down went the trail, yet progressively gaining elevation. The air had changed. A little thinner, a little colder, no trees to provide shelter from the wind.


Eventually I reached the tiny village of Phiroche. It is located above the Tsola River at an altitude of 14,340ft (4,371m). It is a major stopping point for acclimatisation and also an evacuation point. The village has a hospital that runs during the climbing seasons and is operated by the Himalayan Rescue Association with Nepalis staff and volunteer doctors from the US, Europe, Canada and Australia.

Rather than sitting in a lodge, I dug out my gloves and beanie and very slowly over a period of about two hours, I hiked up to Nangkartshang peak (also referred to as the Dingboche Viewpoint) with an altitude of 16,676ft (5,083m). I was wonderfully rewarded at the top with a glorious view of several peaks such as Ama Dablam, Imja Tse, Tobuche and Lobuche and further afield even higher peaks Cho Oyu, Makalu, Lhotse and of course Everest.

As dusk was closing in I retired to my lodge for dinner. Looking for a warm and comforting dish, I settled on a hot noodle soup with pieces of meat and vegetables called Thukpa, accompanied by hot momos, steam filled dumplings.

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Wednesday, April 13, 2022

Mt Kilimanjaro - New Pofu Camp


 As I continued on with the hike through the forest the trail gradually steepened crossing several streams.  Rounding the northern slope of the Shira Ridge at 3937ft (3600m), I emerged from the rainforest onto the expansive Shira Plateau descending 328ft (100m).  The pace has slowed to help with acclimatisation.

The Shira Plateau stretches over 8mi (13km) at an elevation of 12,998ft (3962m).  It was originally one of the three volcanic cones and the first volcano to die out.  About half a million years ago, Shira collapsed in upon itself creating a caldera.  When the Kibo cone exploded 360,000 years ago for the last time, the lava and debris filled the Shira caldera turning it into the plateau it is today.  Dark lava rock was visible as I hiked my way across it.  

A heather and moorland zone, the plateau was filled with grasses, wild flowers and the unusual looking ‘Dendrosenecio kilimanjari’ a giant flowering plant from the sunflower family.  Another beautiful and endemic plant to Tanzania found on the plateau was the ‘Lobelia deckenii”.  Growing for several decades with multiple rosettes, the Lobelia produces one large inflorescence and hundreds of thousands of seeds, then dies. Due to the multiple rosettes the plant continues to reproduce and flower repeatedly. 

Making my way over the plateau, I crossed more streams and large boulders whilst Kibo majestically loomed in the distance awaiting my arrival. 

Reaching the intersection of Lemosho Route and the Northern Circuit, I swung a left turn and commenced my circumnavigational trek around the top quarter of Kili heading north.  The terrain is quite arid with very low and desert-like vegetation slowly moving towards the alpine desert zone.

The elevation ascends and descends approximately 656ft (200m) hovering between 13,779-14,435ft (4200-4400m) for most of this northern route.  Being the newest trail it was very quiet indeed. 

Reaching New Pofu Camp late afternoon, I settled into my tent awaiting another feast to fill my belly and refuel.  Looking forward to another soup, a casserole this time and finishing with a nice hot cuppa.  From here I had magnificent views into Kenya’s wild lands to the north.