Fastpacking

Fastpacking is a multi-day journey on foot, carrying everything you need, moving fast enough that running is a meaningful part of it. That is the whole definition, and everything distinctive about the sport comes out of the tension inside it: you need enough kit to survive a night out, and little enough that you can run with it.

The number that organises everything is base weight — the weight of your pack without food and water. Backpackers talk about it; fastpackers are governed by it. Somewhere below about five kilograms a pack stops feeling like a pack and starts feeling like a vest, and the character of the whole activity changes.

It sits between two things this catalogue already covers, and is served well by neither. Thru-hiking carries more, walks, and takes longer, with margin built in. Trail running carries almost nothing and comes home. Fastpacking takes the pace of one and the self-sufficiency of the other, which is exactly why the kit advice from each is wrong for it — and why the risk is different too, because you are further from help, moving faster, with less spare.

The number that matters

Base weight

Where a pack becomes a vest

Around 5kg

First setup

£600–£1,200

What it is not

Backpacking, quickly

1. 1

   Step 1: Be a trail runner and a camper first

   This is a compound activity and it is a poor place to learn either half. Comfortable four-hour days on rough ground, and at least a few nights out under your own kit, before combining them.

   You will know it worked when: Both halves already familiar.

2. 2

   Step 2: Do one night, close to home, on a low-consequence route

   Out and back, a valley route, somewhere you could walk off in an hour. The first trip is for finding out what your kit and your legs actually do, not for the route.

   You will know it worked when: A full cycle completed with nothing at stake.

3. 3

   Step 3: Weigh everything and write it down

   Every item, in grams, in a list. It is tedious and it is the only way base weight ever comes down, because the savings are distributed rather than concentrated in one heavy thing.

   You will know it worked when: A base weight you know rather than guess.

4. 4

   Step 4: Run with the loaded pack before the trip

   On real terrain, for a couple of hours. Chafing, bounce and hotspots all appear in the first hour and all are fixable at home and miserable on a hill.

   You will know it worked when: A pack that fits when it is full.

5. 5

   Step 5: Then two nights, with a bail-out you have identified

   Not more remote — just longer. Day two under fatigue is the real test and the point at which decision-making, rather than fitness, becomes the limiting factor.

   You will know it worked when: You know how you make decisions tired.

6. 6

   Step 6: Go with somebody who has done it

   The judgement half of this sport transfers by company far faster than by reading. The community is small, friendly and unusually willing to take people out.

   You will know it worked when: Someone else’s hard-won route sense.

The first stage is not fastpacking at all. It is becoming a trail runner who is comfortable for four hours on rough ground, and separately a camper who has spent nights out under their own kit and knows what fails. Trying to acquire both while doing both is how people have a bad first trip and stop.

The second is a single overnight on a low-consequence route, then two nights, then the honest weight work: everything on a scale, written down, with the savings found in a dozen small places rather than one big one. Somewhere in here the sport stops being an endurance problem and becomes a systems problem, which is what most practitioners actually enjoy about it.

After that it is scale and judgement rather than new skills. Longer routes, more remote lines, worse conditions accepted deliberately, and — for a few — FKT attempts on established routes. The limiting factor stops being fitness quite early and becomes the willingness to make an unrewarding decision on day two, which is the thing nobody can practise at home and the reason this sport rewards going out with people who have already learned it.

• A pack that runs, not one that carries — 20–30 litres, vest-style harness, sternum and hip stability rather than load transfer, and bottles or a bladder at the front. A conventional rucksack of the same volume will bounce and chafe once you run in it. £120–£250, and the piece most worth trying on loaded.
• A sleeping system, which is where the weight is — Quilt or light bag, a mat, and a bivvy bag or minimal shelter. This is the single heaviest category and the one where money buys the most grams back — £300–£800 for genuinely light, roughly half that for a kilogram more.
• Waterproofs rated for days rather than hours — A running shell that shrugs off a shower is not the same as one that keeps working on the third wet day. £150–£350, and the item people under-buy most often.
• Insulation you have not budgeted away — A light synthetic or down jacket that stays in the pack unused most trips. It is the margin, and the margin is the thing weight-saving eats first.
• Shoes with more cushioning than you would race in — Day three under load is a different problem from a two-hour trail run. Most fastpackers go a size up and a step softer than their usual trail shoe.
• Food chosen by calories per gram — The one genuinely different calculation from any other running. You are carrying several days of energy, and the difference between good and careless choices here is a kilogram.
• Navigation you can use tired, in the dark, in rain — Map and compass competence plus a GPS, not either alone. The failure mode is a flat battery at the moment you are least able to think.
• A means of calling for help — A charged phone at minimum; a satellite messenger in genuinely remote terrain. Coverage where this sport is worth doing is unreliable and should be assumed absent.

• The three styles, which are definitions rather than rules — If you record a time for a route, the register that holds those times defines the terms. Unsupported "means you truly have no external support of any kind. You must carry everything you need from start to finish except water from natural sources." Self-supported "means you may have as much support as you can manage or find along the way, but not from any thing or person just for you; any support you employ must be equally available to anyone else" — so a village shop is fine and a friend at a layby is not. Supported "can have as much support as you can enlist, as long as you are entirely self-powered".
• Why the vocabulary is worth knowing even if you never submit a time — Because it is how fastpackers describe trips to each other, and because it makes an honest comparison possible. Two people who ran the same route in similar times may have done two quite different things, and the style is the word that says which.
• What counts as a route at all — The register sets a floor — "Routes must be at least 5 miles (8 km) long or have at least 500 feet (150 m) of elevation gain" — and a condition that matters more in Britain than the distance does: routes "shouldn’t go on private property except in rare circumstances where there is permitted access". Verification is required for a time to be accepted.
• The rule that actually constrains a British trip: where you may sleep — This is the real regulatory question in fastpacking and it is not a sporting one. In Scotland, the Land Reform Act gives statutory access rights exercised responsibly, and the Scottish Outdoor Access Code sets out what wild camping under them looks like. In England and Wales there is no equivalent general right, and camping without the landowner’s permission is trespass almost everywhere — with local byelaws layered on top in national parks and on Forestry Commission land. HobbyHQ’s wild camping page carries the detail, because it is the same question and it deserves one home.
• What this page will not give you — Whether a specific pitch, path or route is permitted. That is a per-place answer, it is set by landowners, byelaws and national park authorities that each decide differently, and it changes. Anything published here as a general rule would be wrong somewhere the day it was written.

• Hut-to-hut and bothy running — The same days without the sleeping system, which removes most of the weight and most of the risk. The sensible way in for a lot of people and common across the Alps.
• Supported multi-day running — Somebody meets you with kit each night. A different sport in terms of what you carry, and a legitimate way to run big routes without the self-sufficiency problem.
• Thru-hiking — The same routes at walking pace over more days, with a margin built in rather than trimmed away. Genuinely more accessible and covered separately here.
• Trail and ultra running — The pace half without the overnight, with aid stations and marked courses. Where most fastpackers come from and where the running fitness is built.
• Bikepacking — The same self-supported logic on wheels, carrying more for less effort and covering far greater distances. Frequently done by the same people.
• FKT attempts — The competitive end, on established routes, with published rules about self-support. The nearest thing the sport has to formal competition.