Acclimatisation Guide
Rest Days on Kilimanjaro
What to Do at Camp During Acclimatisation
Rest days on Kilimanjaro are not for sleeping. They are the most important days on the mountain — and the most misunderstood. Here is how to spend them well.
The most common mistake first-time Kilimanjaro climbers make: treating rest days as optional, or as days to push harder.
Rest days exist on every acclimatisation-focused route (Machame, Lemosho, Northern Circuit, Rongai) for one reason: altitude illness. Above 3,500m, your body cannot fully utilise the oxygen you breathe. The only reliable countermeasure is time — giving your blood chemistry time to adapt to the thinner air.
The good news: a well-spent rest day is genuinely restorative. You will eat better, sleep better, and summit more reliably if you approach rest days with the right strategy.
Route by Route
How Each Route Handles Rest Days
Machame Route
Day 3 — Shira 2 Camp (3,840m)Acclimatisation hike to Lava Tower (4,630m) then drop back to Shira 2
The 'climb high, sleep low' principle is most effective on Machame. You hike up to Lava Tower around midday — a dramatic volcanic plug in the middle of the route — then descend 800m to sleep. Your body responds to the altitude gain without suffering the full night at that elevation. Use the afternoon at Shira 2 to explore the Shira Cathedral, a collapsed volcanic crater with extraordinary views west to the Rift Valley wall.
Rest Day Tip
Drink 3–4 litres of water at Shira 2. The altitude suppresses appetite — eat anyway, even if you do not feel hungry. Trail soup, hot chocolate, and electrolyte drinks help more than solid food at this elevation.
Lemosho Route
Day 3 — Shira 2 Camp (3,840m)Full rest day before the difficult Western Breach / Arrow Glacier push
Lemosho's Day 3 at Shira 2 is a true rest day — no big hike. Your guide will recommend short walks to nearby viewpoints, but the main prescription is rest, hydration, and eating. This is the day your body processes the altitude gained on days 1–2. Do not be tempted to push harder on this day — the subsequent days on Lemosho are the most demanding of any route, and recovery matters.
Rest Day Tip
Take photographs of the sunrise from Shira 2 — the light over the Shira Plateau at dawn is some of the finest on Kilimanjaro. The Western Breach wall is illuminated gold and orange in the early morning light.
Lemosho Route
Day 5 — Karanga Camp (4,030m)Short acclimatisation day before the final push to base camp
Karanga is the last camp before the Barafu summit push. The short day from Shira 2 to Karanga (approximately 4 hours) allows your body to settle at 4,000m. On arrival, your guide will set you up in camp and recommend a short acclimatisation walk around the Karanga Valley. This is one of the most beautiful spots on the mountain — a hanging valley with a permanent stream and endemic vegetation.
Rest Day Tip
Karanga Camp has the best mobile signal on the mountain (usually). Use the afternoon to call home, update your travel journal, or review your summit night kit with your guide.
Northern Circuit
Day 4 — Third Cave Camp (3,800m)Longest acclimatisation day on any Kilimanjaro route
The Northern Circuit's third cave camp rest day is the single best acclimatisation opportunity on Kilimanjaro — the route's gentle profile and 4-night sleep above 3,500m give your body more time to adapt than any other route. The afternoon is free. Most climbers use it to explore the northern slopes, photograph the views toward Kenya, or simply sit in the sun and breathe.
Rest Day Tip
The Northern Circuit is the quietest route — on this day you may see only your own group for miles. The sense of remoteness at this altitude is extraordinary.
Marangu Route
Day 3 — Horombo Camp (3,720m)Mid-route acclimatisation before the final push
Marangu is the only route with a formal mid-route acclimatisation day — at Horombo, climbers spend a full day walking to the Mawenzi Plateau (4,500m) and back before descending to sleep. This is an excellent acclimatisation protocol. Use the afternoon to rest, eat well, and prepare your summit kit. Horombo has the best camp infrastructure on the mountain — hot showers (paid), charging facilities, and a small bar.
Rest Day Tip
Horombo's bathrooms have hot showers available for a small fee. This is the most civilised you will feel on the mountain — a hot shower at 3,720m is a genuine luxury.
Universal Principles
The Rest Day Rules That Apply to Every Route
Rest Days on Kili Safari | Recovery & Scheduling
Altitude suppresses the thirst mechanism. By the time you feel thirsty, you are already behind on fluids. Aim for 3–4 litres per day on rest days and 4–5 litres on summit night. Carry a reusable bottle as well as a hydration bladder — both freeze on summit night, so Nalgene bottles are better at altitude.
Rest Days on Kili Safari | Recovery & Scheduling
Altitude kills appetite. But your body needs calories desperately at altitude — you burn 3,000–4,000 calories per day just existing at 4,000m, before any hiking. Hot drinks with honey, warm soups, trail mix, and electrolyte drinks are easier to manage than solid food. Ask your chef for extra porridges and warm milk at rest stops.
Move slowly — 'pole pole'
The golden rule of Kilimanjaro: pole pole (Swahili for 'slowly slowly'). At altitude, your oxygen delivery to muscles is compromised. Moving faster does not compensate — it accelerates altitude illness. On flat sections of rest days, walk at a pace where you can hold a full conversation without breathing hard.
Rest Days on Kili Safari | Recovery & Scheduling
Sleep quality degrades significantly above 3,500m due to periodic breathing (Cheyne-Stokes respiration). Catnapping is more realistic than deep sleep. If you cannot sleep at night, do not panic — close your eyes and rest, and your body will still recover. Do not take sleeping pills — they suppress respiration further at altitude.
Rest Days on Kili Safari | Recovery & Scheduling
Rest days are when blisters and hot spots declare themselves. Remove your boots and check your feet every evening. Tape any hot spots before they become blisters. Drying your socks and liner socks at camp is essential — damp socks at altitude lead to cold injuries and trench foot.
After the Summit
Do Not Skip the Rest Day After the Climb
Most Kilimanjaro operators finish the descent to Arusha on the same day as the summit. We do not recommend this. Summit night burns 4,000–5,000 calories. Your legs will be wrecked. Launching into early-morning game drives immediately after is physically punishing and will diminish your safari experience.
We build in a recovery day in Arusha between the climb and the safari. Sleep properly, eat well, take a hot shower, and let your body recalibrate at sea level before heading into the Serengeti. The wildlife looks better when you are rested.
Ready to Add a Safari After the Mountain?
We handle the complete Kilimanjaro + safari itinerary — one operator, one seamless trip, Arusha-based since 1978. Rest days on the mountain and rest days after, all included in your plan.
Questions
Rest Days on Kilimanjaro — FAQ
Are rest days actually restful on Kilimanjaro?
They are not days of sleeping — your body needs movement to acclimatise. But they are not strenuous days either. A rest day on Kilimanjaro typically involves a 2–4 hour morning hike (the 'acclimatisation hike'), then the afternoon is genuinely free. You should feel more tired than usual from the altitude, not from physical effort.
Can I skip the acclimatisation hike on a rest day?
No — the acclimatisation hike is not optional. The 'climb high, sleep low' protocol is the single most effective method for preventing altitude illness. Guides who skip it are compromising your safety and your summit chances. If your guide does not do the acclimatisation hike, insist on it or change operators.
What if I feel terrible on a rest day?
Tell your guide immediately. Headache, nausea, loss of appetite, and fatigue are normal — but confusion, inability to walk in a straight line (ataxia), and vomiting are not. These are signs of High Altitude Cerebral Oedema (HACE), a medical emergency. Your guide should descend you immediately. Do not 'push through' altitude illness.
Should I take Diamox on rest days?
Diamox (acetazolamide) is usually started before the climb, not during it — though some guides prescribe it mid-route for climbers struggling with altitude. If you are using Diamox, continue it through the rest days and summit night. Do not start it for the first time at altitude without consulting a doctor.
Is there Wi-Fi or mobile signal on rest days?
Mobile signal exists near Shira 2, Karanga, and Horombo camps on the northern and western routes. It is not reliable but works for emergency calls and brief messages. Do not plan to work remotely from Kilimanjaro — signal is intermittent and data is slow. Rest days are for disconnecting.
Can I add a safari rest day too?
Yes — after the climb, we strongly recommend a rest day in Arusha before starting the safari. Your body will be fatigued from the mountain, and launching directly into early-morning game drives is punishing. Arusha has excellent boutique hotels where you can sleep, eat well, and recover before your safari begins.