Passing our trekking self-check means you can hike four to six hours a day with a daypack, do it again the next day, and come down without knee pain. A glaciated peak asks for more than that, and the mountaineering fitness test below measures how much more. Five checks over two weekends and two shorter sessions, with a pass mark for each and a fix for each one you fall short on.
The checks come from the peaks we’ve climbed, from Baker and Rainier to Orizaba, Cotopaxi and Aconcagua, and from the benchmarks the guide services on Rainier publish. Five demands set them: the pace a rope team climbs at, the carry to high camp, a summit day far longer than a trek day, hours of sustained climbing on summit night, and the descent after it.
Talk to a doctor first if you’re new to loaded training, coming back after a long break, or managing a condition. This is a fitness self-check, not medical advice.
Each check has three results. Pass means you’re ready on that measure. Almost means the gap is small and specific. Not yet means build that one before you book.
Two rules before you start. Checks 2, 3 and 5 are heavy days, so run them only after you’ve passed the trekking self-check and have four to six weeks of loaded hiking at 12 to 15% of bodyweight behind you, and keep Check 5 at least a week clear of the Check 2 and 3 weekend. Sharp joint pain ends any check on the spot: score it Not yet and don’t finish for the result. If you fail Check 2 on the Saturday, skip Check 3 on the Sunday.
Check 1: Climb 300 meters in an hour with a pack
The test. Find a steady climb (a trail, a long staircase or a steep treadmill), load a pack to 11 kg (25 lb) and time how long 300 m (1,000 ft) of gain takes you. Climb at an effort you could hold for hours, not a race pace.
Pass. You reach 300 m of gain in an hour or less, with enough left that you could have gone a little faster.
Almost. It takes you 60 to 75 minutes.
Not yet. It takes longer than 75 minutes, or you have to stop more than once to recover.
Why. On a rope team you move at the team’s pace, not yours. RMI Expeditions puts the average climbing pace on Rainier at about 300 m (1,000 ft) an hour, and its benchmark is that gain in an hour with 11 kg (25 lb) on your back. Alpine Ascents uses the same rate as its fitness test, with the full pack the climb requires. If that pace is your limit at home, you have nothing left for altitude, cold and a heavier pack.
The fix. A weekly loaded hike on real vertical that grows in time and gain, at an effort you could talk through. Retest every four to six weeks and watch the time come down.
Check 2: Carry 20% of your bodyweight uphill for three hours
The test. Load a pack to 20% of your bodyweight (16 kg or 35 lb for an 80 kg climber) and climb for three hours on real vertical, gaining at least 900 m (3,000 ft): a hill, a long staircase or a steep treadmill. Hold a pace you could speak in short sentences at.
Pass. You reach the 900 m, and your pace in the third hour is close to your pace in the first. Your shoulders, hips and lower back are tired, not numb or sharp.
Almost. You finish, but the third hour is clearly slower, or you had to stop and reset the pack more than twice.
Not yet. You can’t finish three hours, or your back or shoulders go numb or sharp.
Why. Alpine Ascents lists the approach from Paradise to Camp Muir at 5 to 6 hours, with more than 1,370 m (4,500 ft) of gain under a pack of 18 kg (40 lb) or more. Our packs to high camp on Rainier weighed 22 to 26 kg. A 25 kg pack is a much bigger job for a 60 kg climber than for a 90 kg one, so the test load is a share of you, and 20% for three hours is the test, not the ceiling.
The fix. Rucking, built slowly. Tendons and bone adapt to load more slowly than your heart and lungs adapt to effort. Start at 12 to 15% of bodyweight for an hour and add weight or time each week, never both in the same week.
Check 3: Eight hours on your feet, the day after Check 2
The test. The morning after Check 2, one long day: eight hours minimum on the trail, with at least 1,500 m (5,000 ft) of gain and the same descent, carrying 10 kg (22 lb). Eat something every hour from the first hour, hungry or not.
Pass. In hour eight you’re still eating on schedule, placing your feet on purpose, and able to work out how long the descent will take. Slow is fine. Missed meals and careless footwork are the fail.
Almost. You finish, but you stopped eating somewhere after hour five, or you were tripping on easy ground by the end.
Not yet. You can’t start or finish an eight hour day on legs that carried a load the day before.
Why. Alpine Ascents plans for 10 to 14 hours on foot on Rainier’s summit day, and that day starts in the middle of the night after the carry to high camp. The longest day of the trip begins on legs that worked hard the day before, which is why RMI’s Rainier training plan puts back to back long hiking days into its final weeks. On a day that long the first thing to go isn’t the legs. It’s attention, and on a rope team a stumble at hour twelve pulls on everyone clipped to the same rope.
The fix. A long, deliberately easy aerobic session every week that grows in duration and never in intensity. Hike it when you can, to bank time on your feet, and keep it easy enough to talk the whole way. Twice a month in the final two months, put it the day after your heaviest carry so you practice starting a long day on tired legs.
Check 4: Thirty minutes of loaded climbing without stopping
The test. A stair climber or a steep treadmill, 12 to 15% of your bodyweight in a pack, 30 continuous minutes at a steady effort you could speak short sentences at. No pauses, no hands on the rails.
Pass. You finish. Your legs are what wanted to quit, and your breathing stayed under control.
Almost. You finish, but you touched the rails or slowed down for a minute or more.
Not yet. You stop before 30 minutes. If your lungs gave out before your legs, your aerobic base is the gap, and Check 3’s fix is the fix.
Why. This one measures your legs, not your lungs. A guided team climbs at a talking pace with a rest every hour, but your legs push a loaded pack uphill for hours of the summit night, and legs that fade at minute 20 on the stair climber fade on the glacier. It’s also the check you can run in any gym, any week. RMI tracks a loaded stair climb (floors in 15 minutes) as one of its own benchmarks.
The fix. Loaded intervals that grow into a sustained climb. Four rounds of four minutes hard and two easy on a loaded stair climber is a sensible start, with the hard blocks getting longer over the weeks until they merge.
Check 5: Descend 1,000 meters under load
The test. A continuous descent of 1,000 m (3,300 ft) or more, carrying 15% of your bodyweight, on uneven ground if you can find it. Stairs down a parking garage or a stadium work if you can’t, though they’re easier on you than scree.
Pass. Controlled steps the whole way, knee tracking over the foot, no sharp knee or shin pain, and soreness that peaks mild at 48 hours and is gone by day four.
Almost. A dull knee or shin ache in the last few hundred meters, or soreness that hangs on into day five.
Not yet. Sharp pain, or you ended up stepping down sideways to protect a knee.
Why. On Rainier you descend all 2,700 m of the climb in one day, under a pack, on legs that have been moving since the middle of the night. Alpine Ascents plans 8 to 10 hours for the descent from the summit to Paradise. Each downhill step is a braking contraction. The quads lengthen under load, and that eccentric work damages muscle more than climbing does. A bad descent on a trek costs you a sore week. On a glacier, legs that shake under you make a slip more likely, with a rope team attached and crevasses nearby.
The fix. Slow step-downs off a box, split squats with a three second lowering phase, calf and tibialis work, and loaded walks that finish downhill. Some plans have you pour out your water weight before heading down, to spare the joints. That’s reasonable in the first weeks. Summit day comes down with a full pack, so the last block of training has to as well.
What the mountaineering fitness test can’t tell you
Altitude. The CDC’s guidance is that training and physical fitness don’t affect your risk of altitude illness. Passing all five checks says nothing about how you’ll sleep at 4,000 m. That risk is managed through the itinerary, with a slow ascent profile and rest nights, and it’s a separate decision from training.
Skills. Crampons, rope travel, self-arrest and crevasse rescue come from a course or a guide, before the trip. A fitter climber has more attention left to use them on summit night. Fitness doesn’t replace them. If this is a first peak, six of the mistakes that end first summits are made at home, before you book.
Boots. Run Checks 2, 3 and 5 in the boots you’ll climb in during the final month, so your feet have done hard hours in a rigid sole before summit night.
Reading your results
Pass all five and fitness is unlikely to be the thing that turns you around on a Baker or Rainier class objective. The guide, the itinerary and the weather decide the rest. An Almost on one or two checks usually closes in a 10 week block aimed at those checks. A Not yet on Check 2 or Check 5 means going back to the trekking self-check, passing it cleanly, and building from there.
Run the test four to five months before you fly, so a 10 week block fits between the result and the trip. Run it again three to four weeks out, in your boots, with your actual pack. Then stop testing and taper, because a 1,000 m descent in the final week leaves you sore for days you can’t afford.
If you’d rather have the carry, the long day, the loaded climb and the descent built week by week, that’s what our 10-Week Mountaineering Fitness Plan does. Run the test first, so you know which of the four needs the most work.
