55K Trail Ultra Kit List: The Gear for a Day-Long Mountain Race

Introduction

A 55 km trail ultra with 2,500 m of elevation and a long, comprehensive obligatory kit list leaves no room for guesswork. Everything you carry has to earn its place. This is the full kit list for the Five Valleys Ultra in the Lake District, walking through each item and why it was picked, with plenty of tried-and-tested favourites and a few newcomers being tested in real race conditions. If you are building your own day-long ultra kit, there should be something here to borrow.

The Race and the Kit Challenge

The Five Valleys Ultra is part of a young UK race series organized by the team behind some of the country’s best-known city runs, with the ambition of becoming the UK’s answer to UTMB. The 55 km route starts at Waterhead, Ambleside and finishes in Keswick, visiting five of the Lake District’s thirteen valleys. There are four distances across the weekend: 180 km, 110 km, 55 km and 22 km, with the shorter 2 Valleys option priced at £65.

The race comes with a generous 19-hour cut-off, regular aid stations including three with hot food, and terrain that is steep and technical at times. Weather could be fierce, with wind and rain likely up high, so the obligatory kit list is more comprehensive than even many Alpine or Dolomites races require. Last year’s winner finished in 5 hours while the final runner came in just under 16 hours, with 184 finishers and very few DNFs, so it is doable for most runners.

Upper Body Layers and Waterproofs

T8 Trail Tee

A lightweight tee that adds a bit of warmth without weighing you down. There is no need to overthink this layer, and the T8 Trail Tee does exactly what a race-day shirt should.

Under Armour Rush Base Layer

A long-standing favourite, with several of these base layers in service for five to seven years. The shiny soft fabric stretches and flexes, wicks well and does not get too heavy when wet. The biggest reason for bringing it: it reliably prevents chafed nipples, which matters enormously over 8 to 10 hours. They can run a little warm, but they have held up even in hot conditions.

Salomon Long Sleeve Base Layer

The obligatory long sleeve is a simple Salomon base layer: shiny, smooth, flexible and reasonably loose. It packs small and pairs easily with everything else on the list.

66 North Mid Layer

A fleecy mid layer from 66 North that is compact, small and very lightweight. It slots into the pack alongside the rest of the mandatory warm layers without taking over.

Inov-8 Fuji Trail Jacket

With a high chance of rain forecast, a fully waterproof jacket is non-negotiable. The Inov-8 Fuji Trail Jacket is a lightweight waterproof shell, fully seam sealed, with a waterproof chest pocket, an adjustable hood and the ability to stash into its own pocket. It slots easily into a running vest.

Brooks Gilet

The obligatory insulated layer is covered by this Brooks gilet. It is bigger than ideal, but it is the insulated piece going in the pack, and on a day with wind and rain forecast, that extra warmth layer matters.

Lower Body Layers

T8 Sherpa Shorts

These lightweight trail shorts were recently raced at the New Forest Marathon and immediately earned a spot. The fabric is super light, stretchy and soft, the cut is not too short, and a built-in belt wraps all the way around the top with plenty of extra storage for fuel.

CXP Endurance Briefs

For runs of five hours and beyond, these briefs are the go-to for reducing or even eliminating undercarriage chafe risk. They are light, soft and thin, with really stretchy fabric and silicone-trimmed waistbands that stay put without pressure. The thin material also means they sit nicely under layered shorts, even those with a built-in liner.

Footwear and Socks

Injinji Running Toe Socks

After the way these looked after tired feet over 22 hours at a 100-miler, there was only one choice for race socks. Injinji toe socks solved a long-standing problem with toes rubbing against each other, and the padding is thicker in all the right places without adding weight. The toes hold their shape, ventilation keeps them from getting too hot, and the individual toe pockets give a little more spread where it is needed most.

Inov-8 MetaFuji Trail

A shoe that is both tried and tested and a bit of an unknown. The MetaFuji Trail performed well at the flat, runnable New Forest Marathon, but the question is whether the carbon-plated FlightFoam Turbo midsole and 4.5 mm drop combo holds up when things get steeper and more technical. Earlier testing suggested a slight lack of stability at times, which is a small worry, but this race is the real test of whether an average trail runner can race hard in them on challenging ground.

Extras, Gloves and Outerwear Pieces

Inov-8 Glove Mittens

A couple of buffs go in the pack, one worn and one kept dry, but for hands it is the Inov-8 glove mittens: gloves with a fold-over mitten option. That flexibility covers everything from windy ridgelines to full-on rain.

Beyond the headline items, the pack also carries the lengthy obligatory kit: spare batteries for the head torch, a baseplate compass, a 300 ml mug, cash, a foil survival bag and a small first aid kit. Anti-chafe balm goes on all the usual soft and sensitive spots. The race vest is a more robust 20-litre option rather than a racy minimal vest, chosen because it holds the hefty mandatory kit better, with slots for two soft flasks, a huge mesh drop pocket, a zippered front pocket for the phone and a built-in whistle. It is not waterproof, so dry bags keep the essentials protected.

Tech: Watches, Heart Rate and Audio

Garmin Enduro 3

The Garmin watch test continues, and the Enduro 3 comes along for the ride. A fully waymarked but mountainous 55 km route is a great environment to test battery life, GPS accuracy and mapping over a long, demanding day.

Garmin Fenix 8

Alongside it goes the Fenix 8, giving a direct comparison of route following and mapping behaviour between the two on the same course.

Garmin Enduro 2

The Enduro 2 rounds out the three-watch line-up, adding another data point on battery life and heart rate accuracy when paired with a chest strap.

Polar H10 Chest Strap

For heart rate, the Polar H10 chest strap is the reference. Wearing it for a full race day gives a thorough check of accuracy across climbs, descents and long steady stretches, and lets the watches be compared fairly against each other.

Shokz OpenRun Pro 2

A 55 km day calls for staying connected to the environment while still having some music for motivation. The Shokz OpenRun Pro 2 fits that brief perfectly: the neckband, ear-hook design means nothing can pop out and tumble down a descent, and the IP55 sweat-proofing plus a claimed 12-hour battery life will get a proper examination over continuous use.

Overall Buying Advice

If you are building a kit for a day-long trail ultra, the priorities are clear: layers that manage moisture and warmth across wildly changing conditions, footwear and socks that protect your feet over many hours, and storage that keeps mandatory kit dry and accessible. Start with the items that prevent failure points, like chafe-free base layers and socks, then add weather protection, and only then consider the tech. A slightly heavier, more robust vest that actually holds everything often beats a racy minimal one when the mandatory list is long.

Conclusion

This kit list leans on years-proven comfort pieces, layers serious enough for fierce Lakeland weather, and a tech stack put to work on battery, GPS and heart rate testing over one very long day. Every item here has a specific job, and together they cover everything from a drizzly start to a windy summit to a hot-food aid station deep into the race. If a day-long ultra is on your list, use this as a template and adjust for your own race’s mandatory kit.