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Packing List Generator

Get a customized gear checklist based on difficulty, season, and trip duration

Generator

The Packing List Generator creates personalized gear checklists tailored to the specific mountain, season, difficulty grade, and trip duration. Instead of generic 'what to bring hiking' lists, this tool understands that a winter ascent of Ben Nevis requires ice axes and crampons while a summer day hike on Mount Takao needs nothing more than comfortable shoes and water.

The generator organizes items into intuitive categories: Navigation, Clothing (layered by base/mid/outer), Footwear, Safety & Emergency, Nutrition & Hydration, Shelter & Sleep (for multi-day trips), Technical Gear (altitude/climbing-specific), Electronics, and Personal Items. Each item includes a priority level (Essential, Recommended, Optional) and a brief note explaining why it is needed for this specific trip.

The tool cross-references its recommendations with the mountain's altitude, typical weather, and terrain. A mountain above 4,000m automatically adds altitude sickness medication and a pulse oximeter to the list. Generated lists are interactive — users can check items off as they pack, add custom items, and save the list to their browser for later reference.

An 'essentials only' mode strips the list to the absolute minimum for ultralight enthusiasts, while a 'comfort' mode adds luxury items for those who prefer comfort over speed.

使い方

  1. Select a mountain from the database (optional — you can also use manual inputs)
  2. Choose difficulty grade (1-5) — auto-filled if a mountain is selected
  3. Select season: Spring / Summer / Autumn / Winter
  4. Select trip duration: Day hike / Overnight / 2-3 days / 4-7 days / 1 week+
  5. Optionally toggle "Camping" vs. "Hut/Lodge" for overnight trips
  6. Optionally select altitude range: Below 2,000m / 2,000-3,500m / 3,500-5,000m / Above 5,000m
  7. Click "Generate Packing List"
  8. Review the categorized checklist with priority levels
  9. Check items off as you pack, add custom items, save or print the list

試してみる

this.matchesConditions(item)); if (items.length > 0) { result.push({ ...cat, items }); } } return result; }, matchesConditions(item) { if (!item.conditions || Object.keys(item.conditions).length === 0) return true; const c = item.conditions; if (c.min_grade !== undefined && this.grade < c.min_grade) return false; if (c.season !== undefined && !c.season.includes(this.season)) return false; if (c.min_duration !== undefined) { if (c.min_duration === 'multi' && this.duration !== 'multi') return false; } return true; }, get totalItems() { let count = 0; for (const cat of this.filteredCategories) { count += cat.items.length; } return count; }, get checkedCount() { let count = 0; for (const key in this.checked) { if (this.checked[key]) count++; } return count; }, toggleItem(id) { this.checked[id] = !this.checked[id]; }, isChecked(id) { return !!this.checked[id]; }, clearAll() { this.checked = {}; }, gradeNames: { 1: 'グレード1 - 易しい散歩', 2: 'グレード2 - 中程度のハイキング', 3: 'グレード3 - きつめのトレッキング', 4: 'グレード4 - アルパイン登山', 5: 'グレード5 - テクニカル登攀' }, seasonNames: { spring: '春', summer: '夏', autumn: '秋', winter: '冬' }, durationNames: { day: '日帰り登山', multi: '複数日程' } }">
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活用例

関連用語

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How to Use

  1. 1
    Specify your mountain and route parameters

    Enter the target peak, summit elevation, route technical grade, and expected number of nights above base camp. These inputs determine which gear categories are required — lightweight day-hiking kit differs substantially from multi-day expedition equipment above 6,000 m.

  2. 2
    Set personal and group parameters

    Indicate your party size, personal fitness level, and any medical conditions such as susceptibility to cold injury or altitude illness. The generator weights gear categories accordingly, adding items such as gamow bags, supplemental oxygen indicators, or bear canisters based on the specific mountain's requirements.

  3. 3
    Export and customize the list

    Download or print the generated checklist and cross-reference it against your existing gear inventory. The tool flags safety-critical items in red and marks weight-optional items in grey, allowing you to optimize pack weight while ensuring all mandatory safety equipment is included.

About

Systematic packing is the practical expression of risk management in mountaineering. Every item carried represents a deliberate trade-off between the protection it provides and the metabolic cost of transporting it at altitude — a cost that compounds dramatically as elevation increases and oxygen availability diminishes. The Packing List Generator translates route-specific parameters into gear recommendations grounded in wilderness medicine guidelines, equipment industry standards, and the published practices of national mountain guide associations.

Gear selection for high-altitude objectives is stratified by elevation zone. Below 3,000 m on non-technical terrain, standard three-season hiking equipment suffices. Between 3,000 and 5,500 m, insulation rated for sub-zero temperatures, a sleeping system appropriate to the overnight low, and altitude illness prophylaxis medications such as acetazolamide (as described in the Wilderness Medical Society's 2014 consensus guidelines) become essential. Above 5,500 m on glaciated terrain, technical crampon-compatible boots, ice axe, rope, and harness enter the mandatory safety category. Expeditions to 8,000-metre peaks require supplemental oxygen systems, high-altitude sleeping bags rated below −40 °C, and emergency hyperbaric equipment.

The list generator applies the Wilderness Equipment Rating System (WERS) principle of distinguishing safety-critical from comfort items, allowing climbers to make informed decisions when weight reduction is necessary. Safety-critical items — those whose absence could cause death or serious injury — are flagged as non-negotiable. Comfort items are weight-ranked to facilitate systematic reduction. This structure reflects the International Mountaineering and Climbing Federation (UIAA) principle that preparation thoroughness, not equipment minimalism, is the defining characteristic of safe mountain practice.

FAQ

What are the fundamental gear layers for high-altitude cold-weather mountaineering?
The layering system recommended by wilderness medicine and mountain guide associations comprises three functional layers: a moisture-wicking base layer (typically merino wool or synthetic polyester) that moves perspiration away from skin; an insulating mid-layer (down or synthetic fill rated to the expected overnight low temperature) that traps warm air; and a windproof, waterproof outer shell meeting at minimum ISO 811 hydrostatic head resistance of 1,000 mm and ISO 9073-16 moisture vapor transmission rate standards. Above 5,000 m, a dedicated high-loft down suit or bib system rated to below −30 °C is required in addition to the standard three-layer shell. Extremity insulation — insulated gloves, overboots, and balaclavas — must be rated for the windchill-adjusted temperature rather than the ambient temperature.
What supplemental oxygen equipment is required above 8,000 m?
Above the physiological death zone (conventionally placed at 8,000 m), the partial pressure of oxygen is insufficient to sustain life indefinitely even in acclimatized individuals. Supplemental oxygen systems used in high-altitude mountaineering typically employ Russian-made Poisk or Summit Oxygen regulators delivering a flow rate of 0.5–4 litres per minute from 4-litre composite cylinders rated at 200–300 bar. At a flow rate of 2 l/min the effective altitude is reduced by approximately 1,000–1,200 m, providing a meaningful performance and safety margin. The International Mountaineering and Climbing Federation (UIAA) does not mandate supplemental oxygen but expedition planners on 8,000-metre peaks typically budget one cylinder per 24 hours of climbing above Camp 3.
How should a Gamow bag be used for high-altitude emergencies?
The Gamow Portable Hyperbaric Chamber, designed by Igor Gamow and described in publications of the Wilderness Medical Society, is an inflatable pressure bag that simulates descent by increasing ambient pressure inside to a level equivalent to 1,500–2,000 m lower elevation. The patient is placed inside, the bag is inflated to approximately 2 psi gauge pressure using a foot pump, and the simulated descent typically begins reversing symptoms of high-altitude cerebral oedema (HACE) within 15–30 minutes. Real descent remains the definitive treatment, but the Gamow bag can stabilize a patient long enough to arrange evacuation. It weighs approximately 6 kg and is a standard item on expeditions to peaks above 7,000 m.
What navigation equipment is essential for routes without marked trails?
Routes above treeline on technical mountain terrain require: a calibrated magnetic compass with a baseplate suitable for 1:25,000 or 1:50,000 topographic map reading; a GPS receiver or smartphone app loaded with offline topographic data from sources such as OpenTopoMap or Caltopo; and an altimeter watch cross-calibrated against GPS elevation to track pressure-altitude changes that signal approaching weather systems. Navigation above snowline requires the ability to take compass bearings in whiteout conditions. The UIAA Safety Commission recommends GPS as a supplement to — not a replacement for — paper map and compass skills, given the risk of battery failure in extreme cold (lithium batteries retain better performance than alkaline below −20 °C).
How does pack weight affect altitude performance, and what are the recommended weight guidelines?
Research published in the journal Medicine and Science in Sports and Exercise demonstrates that each kilogram of additional pack weight increases oxygen consumption at a given walking speed by approximately 1%, compounding the already severe oxygen deficit at high altitude. The American Mountain Guides Association (AMGA) recommends that technical mountaineering packs on multi-day high-altitude routes not exceed one-third of the climber's body weight when fully loaded. Summit day packs on routes where caching gear is possible should be reduced to 5–8 kg. Weight optimization focuses first on sleeping system (down bag and insulated pad), then on clothing layers, with safety equipment such as rescue kit and first-aid supplies treated as non-negotiable fixed weights that cannot be reduced below minimum functional thresholds.

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