Up and Under Trail Running

Welcome to the Trail and Ultra Running section of our website. Up and Under in Cardiff has been supplying fell running specific footwear for years, but has expanded into the wide ranging and glorious world of trail running in the past 10 years. We have a close working relationship with a number of trail and ultra race organizers in the area, most notably Run Walk Crawl, Ridge Runners and Up Hill Down Dale and have therefore expanded our range to cover Ultra Running products that can help you race on all terrains, through day and night, for 4 seasons of the year.

A lot of our core clothing ranges and equipment such as headtorches, first aid kits, whistles, etc. are equally appropriate for trail-running so don't forget to take a look around those sections or use our search if what you need isn't immediately obvious within this part of our catalogue.

We select the best trailshoes, packs, poles, vests, torches and clothing from baselayer through socks, shorts, tights and insulation to windproof and waterproof shell, hats and gloves and we have what you need for all your fell and trail-running needs, all carefully selected by our staff with insights from Run, Walk Crawl to suit you. It's all from the best brands, but see the quick links below to rapidly access some of our most popular. It's also worth having a browse outside of running through our Odlo range for extra warm quick drying, high wicking, lightweight base and midlayer clothing and everything beyond.

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Instinct Race Number Belt

Th3 Instinct Race Number Belt is a race-day essential, the Race Number Belt keeps your race number secure and visible, so you can focus on performing your best. Equipped with three spring-loaded toggles, it firmly holds your race number in place, even during intense movement. With reflective logos for added visibility and an adjustable, one-size-fits-all design, this belt combines practicality with comfort. The sturdy nylon buckle clip ensures a quick and reliable fit every time.

£10.00 inc. VAT

Injinji Halloween Crew

Get ready to add a dash of spooky fun to your run with the Injinji Halloween Crew Socks! Perfect for long-distance runs and tough hikes over rugged terrain, these themed toe socks not only look cool, but they’re also designed for peak performance. The individual toe design reduces friction, helping prevent blisters while allowing your toes to splay naturally, giving you better control on narrow, uneven trails. The crew length sits high to keep out debris, while an arch band provides extra support. Made with moisture-wicking COOLMAX® EcoMade fibres and breathable mesh, they keep your feet cool and dry, while durable nylon and mid-weight cushioning offer comfort and protection with every step.

From £16.93 inc. VAT

Injinji Halloween No-Show

The Injinji Halloween No-Show socks are a spooky twist on Injinji's lightest and most versatile running socks, perfect for all terrains and conditions. These socks feature Injinji's signature five-toe design, which helps prevent blisters by reducing friction and allows your toes to move naturally for a more responsive feel on uneven ground. Crafted with a soft and durable, seamless design, they offer a snug and secure fit. The breathable mesh top and COOLMAX® EcoMade fibres work together to keep your feet cool and dry, while an arch band provides extra support. With a no-show cut that sits below the ankle and a heel tab to prevent chafing and slipping, these socks are both functional and fun for your Halloween runs!

From £16.03 inc. VAT

Black Diamond Gridtech Storm Hood Gloves

The Black Diamond Gridtech Storm Hood Gloves are designed with a thermal insulating sleeve and include a stowable, waterproof hood for enhanced cold weather protection. Engineered for extended runs in harsh conditions, these gloves offer robust defence against the elements. The grid fleece construction ensures exceptional warmth while maintaining breathability, and the moisture-wicking properties keep your hands dry. For unexpected downpours or cold snaps, the gloves feature a stowable 3-layer waterproof hood made from 100% recycled nylon ripstop, providing an extra layer of protection when needed.

From £53.05 inc. VAT

Black Diamond UL Overmitts

The Black Diamond UL Overmitts are expertly crafted for fast and light expeditions in severe weather conditions. These ultra-lightweight mitts feature a 3-layer breathable recycled nylon shell that is both windproof and waterproof. Additionally, they are designed to pack down compactly, fitting easily into a small film case for convenient portability.

From £44.22 inc. VAT

Darn Tough Men's Run Quarter No Cushion Ultra-Lightweight Running Sock

The Darn Tough Men's Run Quarter No Cushion Ultra-Lightweight Running Socks are an ultra-lightweight merino wool sock that have been designed with running in mind. They feature breathable flex zones in the forefoot, silky next-to-skin ribbing and fatigue-zapping arch support that work together to keep you fresh and comfortable on the trail. Their performance fit mean no slipping, no bunching and most importantly, no blisters! So you can focus on your run and not your feet.

From £19.60 inc. VAT

Injinji Artist Designed Women's Crew

The Injinji Artist Designed Women’s Crew Socks perfectly blend trail performance and original artwork, so your socks can keep up with your adventures while showing off your style. Crafted with COOLMAX® EcoMade fibres, these socks wick away moisture to keep your feet cool and dry, while the blister-preventing toe sleeves give every toe its own space. Designed with a women’s-specific fit, they hug your feet for all-day comfort. And thanks to their crew-height coverage, you can say goodbye to pesky trail debris sneaking in.

From £16.93 inc. VAT

Injinji Artist Designed Men's Mini-Crew

High-performance, eco-conscious, and artist-inspired. Elevate your run or hike with the Injinji Artist Designed Men's Mini-Crew Socks, blending athletic functionality with exclusive, limited-edition art. Featuring COOLMAX® EcoMade fibres made from 100% recycled materials, these socks keep your feet cool and dry while supporting the planet. Designed to prevent blisters with midweight cushioning, they deliver a custom fit that combines exceptional performance with unique style.

From £16.03 inc. VAT

Injinji Artist Designed Women's Mini-Crew

Elevate your outdoor adventures with the Injinji Artist Designed Women’s Mini-Crew Socks, where vibrant design meets trail-ready performance. Created by talented artists within the outdoor community, each pair features exclusive, limited-edition prints to showcase your personal style. You can confidently tackle any terrain, knowing the blister-preventing toe sleeves and moisture-wicking COOLMAX® EcoMade fibres will keep your feet comfortable, dry, and protected. These socks are the perfect way to bring a touch of art to your next run, hike, or everyday journey.

From £16.03 inc. VAT

Injinji Artist Designed Men's Crew

Experience the perfect blend of high-performance gear and artistic expression with the Injinji Artist Designed Men's Crew Socks. Made using premium COOLMAX® EcoMade fibres to keep your feet cool and dry, no matter how tough the trail gets, and designed with individual toe sleeves, they actively prevent blisters and allow for natural toe splay, while the taller crew cuff confidently blocks out debris. As a limited-edition piece, you can showcase your unique style while enjoying superior comfort and protection on every run or hike.

From £16.93 inc. VAT

PhD Smart Bar

The PhD Smart Bar is your ideal high-protein snack, combining 21g of protein with less than 2g of sugar per bar. Available in various delicious flavours, each bar features a soft protein centre, gooey caramel, and crispy protein pieces, all coated in smooth chocolate for a true confectionery taste. Perfect for those maintaining a lean lifestyle without sacrificing flavour, it's also palm oil-free for a more sustainable choice.

From £2.99 inc. VAT

INOV8 Trailtalon Women's

The INOV8 Trailtalon Women’s trail running shoes are designed for fast, confident running on soft ground and mixed terrain. Featuring a graphene enhanced outsole with aggressive 6mm lugs, they deliver outstanding grip across mud, rock, and woodland trails. Lightweight cushioning from the Powerflow Pro midsole and Boomerang footbed keeps every run comfortable and responsive. Perfect for everyday training and longer trail races.

From £114.73 inc. VAT

INOV8 Trailtalon Men's

The INOV8 Trailtalon Men's have been built for running on tough and mixed terrains that may be wet or muddy. These waterproof trail shoes are an evolution of Inov8's popular Roclite range and will excel across all surfaces whilst keeping your feet warm and dry thanks to their Gore-Tex membrane. A graphene-infused rubber outsole provides uncompromising grip of soft surfaces such as mud or slippery woodland trail with hard, rocky ground. There are breathable mesh zones for added ventilation and reinforced areas in places the shoe is likely to see wear. A strong heel cradle delivers a secure, locked-in fit, whilst a toe bumper protects against any unseen obstacles on the trail.

From £114.73 inc. VAT

VJ-Sport IRock+

The VJ-Sport IRock+ trail shoes feature a noticeably wider last for more space in the toebox and forefoot, while still maintaining a precise fit in the heel and midfoot. Known for its aggressive performance in softer conditions, the IRock+ offers optimal grip with its larger lugs and VJ’s signature Butyl rubber outsole. The LightEVA midsole ensures a light, responsive run, and the durable armoured nylon upper protects your foot on rugged terrains, with a soft heel counter for added comfort.

From £132.76 inc. VAT

VJ-Sport MAXx 2

The VJ MAXx2 is a versatile, well-cushioned, and fast trail running shoe for various terrains. It features the innovative SuperFOAMance midsole, made from ultralight, nitrogen-infused material for exceptional cushioning and energy return. This advanced foam is lighter, more responsive, more comfortable, and more durable than traditional EVA foam. A full-length rock plate in the midsole provides added protection against sharp edges and branches, enhancing torsional rigidity and energy efficiency.

From £132.76 inc. VAT

OMM Ltd Ultra Flexi Cup

The OMM Ltd Ultra Flexi Cup is a flexible folding cup that's been designed for drinking on-the-go and at camp. Made with durable thermoplastic which allows for easy storage and compression, whilst its shaped lip allows for easy filling and drinking.

£8.00 inc. VAT
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