On CloudRock 2 Waterproof Hiking Boots: Complete Trail-Tested Review 2025

My Trail Testing Experience

When I first laced up the On CloudRock 2 waterproof boots at the Cascade Trailhead last spring, I wasn't sure what to expect from this hybrid design. As someone who's tested over 50 pairs of hiking boots across three decades of outdoor adventures, I approached these with both excitement and skepticism. The distinctive Cloud cushioning technology promised trail runner comfort with hiking boot protection—a combination that often results in compromise rather than excellence.

My testing regime included 75 miles of diverse terrain: from the technical boulder fields of Rocky Mountain National Park to the muddy, root-strewn trails of Olympic National Forest. I wore these boots through spring snowmelt, summer thunderstorms, and autumn leaf-covered trails, deliberately subjecting them to conditions that would reveal their true character.

The first thing I noticed was the surprisingly secure fit despite the lightweight construction. Unlike traditional CloudRock boots, the version 2 features an improved collar design that eliminates the ankle pressure points I experienced with the original model. This became evident during my first full-day hike on Washington's Mount Pilchuck, where the boots remained comfortable throughout 12 hours of varied terrain.

What struck me most was how these boots blur the lines between categories. They're lighter than traditional hiking boots but more supportive than trail runners. During creek crossings in Glacier National Park, the waterproof membrane kept my feet completely dry, while the breathable upper prevented the swamp-foot syndrome common with many waterproof boots. However, this performance came with trade-offs that became apparent over extended use.

Design and Build Quality

The On CloudRock 2 waterproof represents Swiss precision engineering at its finest. The boot features a fully synthetic upper constructed from recycled materials, demonstrating On's commitment to environmental responsibility without compromising performance. The distinctive Cloud sole technology, which made On famous in the running world, has been adapted for hiking with deeper lugs and a more aggressive tread pattern.

The construction quality impressed me from the start. Unlike many synthetic boots that feel cheap or plasticky, these have a substantial feel while maintaining their lightweight character. The seamless upper construction minimizes potential failure points, though it creates a slightly narrower fit that won't suit everyone. The TPU overlays provide structure where needed without adding unnecessary bulk.

One standout feature is the improved lacing system. The original On CloudRock used traditional eyelets throughout, but the version 2 incorporates speed laces at the ankle with hooks at the collar. This hybrid system allows precise foot adjustment while enabling quick on/off capability—a feature I particularly appreciated during frequent stream crossings where I needed to dump water quickly.

The heel cup design deserves special mention. On addressed the heel slippage issues from the original model with a more anatomically shaped counter that locks the heel securely. During steep descents on Mount Washington's Tuckerman Ravine trail, I experienced zero heel lift—a significant improvement that enhances both comfort and safety on technical terrain.

However, durability questions emerged during extended testing. While the upper held up admirably, the sole lugs showed noticeable wear after just 50 miles of mixed terrain. This isn't unexpected for a lightweight boot, but it's worth considering for those planning high-mileage adventures. The CloudRock 2 waterproof seems optimized for weekend warriors rather than thru-hikers.

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Waterproof Performance and Breathability

The waterproof performance of the On CloudRock 2 waterproof proved exceptional during my Pacific Northwest testing. Unlike boots with Gore-Tex or similar membranes, On uses their proprietary waterproof technology, which they claim offers superior breathability. After extensive puddle-stomping, creek crossing, and rain hiking, I can confirm these boots keep feet dry in all but the most extreme conditions.

My most rigorous waterproof test came during a spring hike through the Hoh Rainforest, where I encountered everything from light drizzle to torrential downpours. After six hours of continuous moisture exposure, my feet remained completely dry. The membrane also handled stream crossings admirably—I deliberately stood in ankle-deep water for 10 minutes with no water penetration.

However, the real revelation was breathability. Traditional CloudRock waterproof boots often create a sauna effect, but these managed moisture exceptionally well. During a hot summer climb of Mount Monadnock (85°F, high humidity), my feet felt surprisingly fresh despite the challenging conditions. The strategic mesh panels work in harmony with the waterproof membrane to move moisture efficiently.

That said, no waterproof boot is perfect. In extremely wet conditions combined with high output activities, some internal condensation is inevitable. I noticed slight dampness during a particularly aggressive scramble up New Hampshire's Mount Washington in driving rain—though I couldn't determine if this was external leakage or internal condensation. For most hiking scenarios, the waterproof performance exceeds expectations.

Winter performance deserves special mention. During February snowshoe hikes in Vermont's Green Mountains, the boots handled snow and slush admirably. The gaiter-friendly design keeps snow from entering the top, while the waterproof membrane prevents slush penetration from below. However, insulation is minimal—I needed warm socks for extended winter use, unlike dedicated On CloudRock hiking boots with additional thermal properties.

Trail Performance and Traction

The On CloudRock 2 waterproof truly shines on moderate to technical terrain. The Missiongrip rubber outsole provides excellent traction on most surfaces, though with some notable limitations. During my testing across diverse conditions, these boots demonstrated impressive capability that often exceeded my expectations based on their lightweight construction.

On hardpack trails, the performance is outstanding. The unique Cloud cushioning system provides exceptional comfort over long distances while maintaining enough firmness for precise foot placement. During a 15-mile traverse of Vermont's Long Trail, I experienced less foot fatigue than with traditional hiking boots weighing twice as much. The responsive feel makes quick direction changes effortless—crucial when navigating technical rocky sections.

Rock scrambling revealed both strengths and limitations. The boots excel on dry granite and sandstone, providing confident grip on moderate scrambles. The toe box design offers enough protection for light technical work, though I wouldn't attempt serious Class 4 terrain in these. However, on wet rock, performance drops significantly. The Missiongrip compound lacks the sticky quality of Vibram Megagrip, making wet boulder hops more tentative than I'd prefer.

Mud performance impressed me during spring hikes in New England's notoriously boggy conditions. The lug pattern sheds mud reasonably well, though deep clay occasionally packed between the forefoot lugs. The overall traction in muddy conditions surpassed most lightweight alternatives, though dedicated On CloudRock boots without waterproofing might edge out slightly due to different compound formulations.

The ankle support deserves careful consideration. While marketed as a mid-height boot, the On CloudRock 2 waterproof provides moderate ankle support—more than trail runners but less than traditional hiking boots. During off-camber traverses and loose scree slopes, I felt confident but not invincible. The support proved adequate for day hiking with light loads but felt marginal when carrying overnight gear on technical terrain.

Speed hiking is where these boots truly excel. The lightweight construction and responsive cushioning make them ideal for fast-paced adventures. During a training hike for Mount Washington's annual race, I maintained sub-20-minute miles on technical terrain—impossible in traditional hiking boots. This capability makes them perfect for those who prefer moving quickly through the mountains.

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Comfort and Fit Analysis

Comfort represents the strongest aspect of the On CloudRock 2 waterproof design. After testing dozens of hiking boots over three decades, I can confidently say these rank among the most comfortable straight out of the box. The Cloud cushioning technology translates beautifully from road running to trail hiking, providing exceptional underfoot comfort without sacrificing stability.

The break-in period was virtually nonexistent. Unlike traditional leather boots that require weeks of conditioning, I wore these on a 12-mile hike on day one without any hot spots or discomfort. The synthetic upper materials conform quickly to foot shape while maintaining their structural integrity. This immediate comfort makes them ideal for hikers who need boots for upcoming adventures without extensive break-in time.

Sizing proved slightly tricky. I typically wear size 10.5 in most hiking boots, but found the On CloudRock 2 waterproof runs about a half-size large. The 10.5 felt sloppy with excessive heel movement, while size 10 provided a snug, performance-oriented fit. I recommend trying them on or ordering multiple sizes if purchasing online. The toe box width is moderate—suitable for average feet but potentially problematic for those with wide feet.

The cushioning system deserves detailed analysis. Unlike traditional EVA foam that can feel dead underfoot, the Cloud system provides responsive energy return. During long descents, this translates to reduced fatigue and fewer impact-related issues. However, the trade-off is reduced ground feel compared to minimalist hiking boots. Rock features and trail irregularities are less noticeable, which some hikers prefer while others find it less secure.

Long-distance comfort proved excellent with some caveats. During all-day adventures, the boots maintained their supportive feel without the structural breakdown common in lightweight footwear. However, the narrow fit became more noticeable during extended wear, creating pressure points for those with wider feet. The On CloudRock waterproof hiking boots seem designed for average to narrow feet rather than accommodating diverse foot shapes.

Temperature regulation impressed me across seasons. The synthetic materials don't retain odors like some boots, while the breathable waterproof membrane prevents the overheating common with traditional waterproof boots. During summer hiking in humid conditions, my feet remained surprisingly comfortable—a significant advantage for multi-day adventures.

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Pros and Cons

After extensive testing, the On CloudRock 2 waterproof emerges as a specialized tool rather than a universal hiking solution. Understanding both strengths and limitations is crucial for making an informed purchasing decision. These boots excel in specific scenarios while falling short in others.

Consider these boots if you prioritize comfort, style, and moderate performance for weekend adventures. Look elsewhere if you need maximum durability, wide fit options, or boots capable of handling extreme conditions with heavy loads. The On CloudRock 2 serves a specific niche rather than attempting to be everything to everyone.

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Frequently Asked Questions

Are the On CloudRock 2 waterproof boots truly waterproof?

Yes, during extensive testing including stream crossings and extended rain exposure, the On CloudRock 2 waterproof boots maintained complete water protection. On's proprietary waterproof membrane proved more breathable than Gore-Tex alternatives while providing equal waterproof performance. However, like all waterproof boots, extreme conditions combined with high activity levels can overwhelm the membrane's breathability, leading to internal condensation. For typical hiking scenarios including creek crossings and rain hiking, waterproof performance is excellent.

How do they compare to traditional hiking boots for ankle support?

The On CloudRock 2 waterproof provides moderate ankle support—significantly more than trail runners but less than traditional hiking boots. The mid-height collar and structured heel counter offer adequate support for day hiking with light to moderate loads. However, for technical terrain, heavy pack weights over 35 pounds, or extended expeditions, traditional hiking boots provide superior ankle stability and protection. These boots work best for fast hiking on moderate terrain rather than heavy-duty mountaineering applications.

What is the expected lifespan of these boots?

Based on testing and user reports, expect 200-400 miles from the On CloudRock 2 waterproof depending on terrain and usage patterns. The lightweight construction prioritizes comfort and performance over maximum durability. Sole lugs show wear after 50 miles of mixed terrain, while upper materials generally hold up well with proper care. For weekend hikers averaging 20-30 miles per month, they should last 1-2 seasons. However, thru-hikers or high-mileage users should consider more durable alternatives designed for extended wear.

Do they run true to size, and what about width options?

The On CloudRock 2 waterproof runs approximately half a size large compared to most hiking boots. I recommend sizing down from your typical hiking boot size for optimal fit. The boots are only available in standard width, which accommodates average to slightly narrow feet well. Those with wide feet may experience pressure points and should consider trying them on before purchasing. The sleek profile that contributes to their performance also limits accommodation for diverse foot shapes, making proper sizing crucial for comfort.

Are they suitable for winter hiking and snowshoeing?

The On CloudRock 2 waterproof works adequately for winter hiking with limitations. The waterproof membrane prevents snow penetration, and the gaiter-friendly design keeps snow out of the boot top. However, insulation is minimal, requiring warm wool or synthetic socks for comfort in cold conditions. Traction on snow and ice is limited without microspikes or crampons. They're suitable for winter day hikes on groomed trails but inadequate for serious winter mountaineering or extended cold-weather expeditions requiring specialized insulation and aggressive traction systems.

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Conclusion

After 75 miles of diverse terrain testing, the On CloudRock 2 waterproof emerges as a specialized tool that excels within specific parameters. These boots represent the evolution of hiking footwear toward lighter, more comfortable designs that blur traditional category lines. For hikers who prioritize comfort, waterproof protection, and moderate performance over maximum durability and heavy-duty capability, they deliver exceptional value.

The standout features—immediate comfort, excellent waterproofing, and lightweight performance—make these boots ideal for weekend warriors, fast hikers, and those transitioning from trail runners to more supportive footwear. The Swiss engineering shows in details like the improved heel cup, strategic cushioning placement, and breathable waterproof membrane that outperforms many traditional alternatives.

However, limitations prevent universal recommendation. The durability questions, narrow fit, and premium pricing create barriers for some users. Those requiring maximum ankle support, extended durability, or accommodation for wide feet should explore alternatives like the On Running CloudRock non-waterproof versions or traditional hiking boot options.

My personal recommendation: Choose the On CloudRock 2 waterproof if you're an active day hiker who values comfort and performance over maximum durability. They're perfect for those weekend adventures where you want hiking boot protection with trail runner agility. Skip them if you need boots for extended expeditions, carry heavy loads regularly, or require maximum durability for high-mileage use.

The outdoor gear landscape continues evolving toward lighter, more comfortable options that challenge traditional wisdom about what hiking boots should be. The On Running CloudRock waterproof represents this evolution beautifully—not perfect for everyone, but exceptional for their target audience of performance-minded weekend adventurers.

Whether you choose these boots or explore alternatives, prioritize fit testing and honest assessment of your hiking needs. The best boots are those that match your specific requirements rather than trying to excel at everything. The On CloudRock 2 waterproof excels at being lightweight, comfortable, and protective—exactly what many modern hikers want from their footwear.

For more detailed comparisons and alternative recommendations, explore our comprehensive guides to CloudRock hiking boots and women's On CloudRock hiking boots. Happy trails, and may your adventures be comfortable, dry, and memorable.