The 7 Steepest Day Hikes in the US, Ranked by Gradient

The steepest day hike in HikeLoad's US trail database is Hidden Canyon in Zion, which climbs 476 m in just 1.59 km - an average of 299 m of ascent per kilometre. Mount Storm King (290 m/km) and Mailbox Peak (270 m/km) follow. Anything above 150 m/km will halve your normal walking pace.

Distance is a bad way to judge a hard day. A 16 km valley walk is a morning; a 4.5 km climb up Mailbox Peak is a full day with your hands on your knees. So we ran the numbers on every US day trail in our GPX library and sorted them by the only figure that predicts suffering: metres of ascent per kilometre of trail.

One honest caveat before the table. These distances and elevation gains come from the GPX tracks we hold for each trail, which in several cases cover the steep tracked segment rather than every metre of approach road. They are consistent with each other, which is what makes the ranking meaningful - but check the trail page for the version of the route you plan to walk.

Which US day hikes climb the hardest per kilometre?

For context, a European alpine hut-to-hut stage typically averages 70-90 m/km, and a well-graded national park switchback trail sits near 60 m/km. Five of the seven trails above are more than twice that.

1. Hidden Canyon, Zion - 299 m/km

Short does not mean easy. Hidden Canyon gains 476 m across 1.59 km of sandstone switchbacks and a chain-assisted ledge section carved into the cliff, which means the exposure arrives before your legs are warm. It is the steepest average gradient in our entire US day-trail set. Rockfall has closed this route for extended periods in recent years, so check the park's current Zion hiking conditions page before you drive out - as of 2026 the chain sections are the first thing the park closes after a storm. If it is shut, our guide to the best hikes in Zion National Park covers the alternatives.

2. Mount Storm King, Olympic National Park - 290 m/km

Mount Storm King packs 652 m of climbing into 2.25 km above Lake Crescent, and the final stretch is a rope-assisted scramble on loose ground that the park service does not maintain. Turning round at the rope section is a legitimate finish - the lake view from the last maintained viewpoint is most of the reward. Pair it with the gentler valley walks in our Olympic National Park trail roundup if you want a second day that your quads will forgive.

3. Mailbox Peak, Washington - 270 m/km

The old Mailbox Peak boot path is the benchmark fitness climb of the Seattle area: 1,212 m of ascent in 4.49 km, with almost no switchbacks and no water after the trailhead. Locals use it as Rainier training, and there is a genuine mailbox on the summit. A newer graded trail covers the same elevation over roughly twice the distance, so read the signage at the parking area carefully - people end up on the old route by accident every weekend. We compare it head-to-head with the shorter option in Mailbox Peak vs Mount Pilchuck.

4. Tuckerman Ravine, New Hampshire - 212 m/km

The biggest total climb on this list: 1,255 m over 5.92 km up the headwall to Mount Washington. Tuckerman Ravine is also the only entry where the weather is more dangerous than the gradient - summit winds regularly exceed 160 km/h and summer whiteouts are routine. Read the Mount Washington Observatory higher-summit forecast the morning you go, not the night before. If the summit is socked in, Franconia Ridge (587 m over 7.24 km) is the sheltered fallback, and our Franconia Ridge vs Mount Washington comparison explains when to swap.

5-7. Dog Mountain, Mount Pilchuck and Mount Marcy

These three are the entry level of steep - hard days, but not hands-on-rock days. Dog Mountain climbs 738 m in 4.64 km through the Columbia Gorge wildflower meadows and needs a permit on spring weekends. Mount Pilchuck gains 640 m over 4.19 km to a restored fire lookout, with a boulder field near the top that slows most people more than the gradient does. Mount Marcy, New York's highpoint, is the gentlest here at 118 m/km but the longest sustained effort of the three.

Two near-misses deserve a mention: Skyline Divide (801 m over 8.54 km) and White Oak Canyon (722 m over 7.66 km) both sit at 94 m/km - steep by any normal standard, and better first attempts than anything in the top four. More Cascades options are in our Washington Cascades guide.

How much does gradient actually slow you down?

Naismith's rule adds one hour per 600 m of ascent to your flat-ground pace. On a 300 m/km trail that maths breaks down, because you are no longer walking - you are stepping up. A useful field rule from these seven trails:

• Under 100 m/km - normal hiking pace, roughly 4 km/h uphill.
• 100-200 m/km - expect 2.5-3 km/h; rest steps on the steepest pitches.
• Over 200 m/km - budget 1.5-2 km/h. Mailbox Peak's 4.49 km takes most fit hikers 2.5 to 3 hours up.

Run your own numbers with the hiking time calculator, which factors ascent into the estimate rather than assuming a flat average speed. The descent is where these trails collect their injuries, not the climb - see how to prevent knee pain hiking downhill before you commit to a 1,200 m drop in under 5 km.

What to carry on a very steep day hike

Steep trails punish pack weight more than any other terrain, because every gram gets lifted the full vertical distance. Carrying 12 kg up Mailbox Peak means lifting it 1,212 m - the equivalent of climbing a 400-storey building with it. Strip the load first, then pick the smallest pack that holds it.

For a summer half-day like Hidden Canyon or Mount Storm King, a running-style vest is the honest answer: the Salomon ADV Skin 12 weighs 260 g and keeps water bottles on your chest, where they do not shift on a scramble. For a full climb with a shell, lunch and 2 litres, the Hyperlite Mountain Gear Aero 28 at 536 g is the lightest genuinely load-carrying option we have weighed. The Fjällräven Abisko Hike Lite 20 (600 g) suits hikers who want a conventional back panel, and the Lowe Alpine AirZone Active 18 (770 g) trades 234 g against a ventilated frame that matters on a sweaty Gorge climb in July. That spread - 260 g to 770 g for the same day - is a free 510 g before you pack a single item.

Two things we would not cut: 2 litres of water minimum, because none of the top three trails has a reliable source above the trailhead, and trekking poles for the descent. Check your total against the base weight calculator if you are unsure where your load is going.

Which steep hike should you do first?

Start with Mount Pilchuck or Dog Mountain at roughly 155 m/km. Both give you a full steep day with a maintained trail underfoot and no scrambling, which tells you honestly whether your knees and lungs are ready. Move up to Mailbox Peak or Tuckerman Ravine next - those are endurance tests rather than technical ones. Save Hidden Canyon and Mount Storm King for last: their gradients are the highest here, but the real filter is exposure and loose ground, and that is a head problem more than a fitness one.

Frequently Asked Questions

What counts as a steep hiking trail?

Anything above 100 m of ascent per kilometre is steep; above 200 m/km is exceptionally steep and usually involves scrambling, chains or rope-assisted sections. A well-graded national park switchback trail averages around 60 m/km. Hidden Canyon in Zion reaches 299 m/km, roughly five times a standard graded trail.

How long does it take to climb 1,000 m?

Most fit hikers climb 300-400 m of ascent per hour, so 1,000 m takes 2.5 to 3.5 hours. On very steep ground above 200 m/km that drops toward 250-300 m per hour because of shorter steps and more rest stops. Mailbox Peak's 1,212 m typically takes 2.5-3 hours up and about 2 hours down.

Is a steep short hike harder than a long flat one?

For most hikers, yes. A 4.5 km climb with 1,200 m of ascent demands sustained effort at a high heart rate and loads the quads eccentrically on descent, while a 15 km flat walk mainly tests endurance. Recovery from the steep day is usually longer, with delayed muscle soreness peaking 24-48 hours later.

Do you need trekking poles for steep trails?

On descents of more than 600 m, poles meaningfully reduce the load your knees absorb and improve balance on loose ground. On chain-assisted or scrambling sections like Hidden Canyon and the upper Mount Storm King rope, stow them - you need both hands free. Collapsible Z-fold poles that fit inside a 20-litre pack are the practical compromise.

How much water should you carry on a steep day hike?

Carry at least 2 litres for a half-day climb and 3 litres for a full summit day in summer heat. None of the seven trails ranked here has a dependable water source above the trailhead, so filtering en route is not an option. Water is 1 kg per litre, which is why keeping the pack itself under 600 g matters on a 1,200 m ascent.