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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Rab

Sonic Ultra Tee

The Rab Sonic Ultra Tee is a lightweight, breathable running shirt designed for mountain runners pushing their limits. Made with ultralight Motiv™ Aero fabric, it wicks moisture, dries fast, and regulates temperature, keeping you cool and comfortable on tough climbs. Laser-cut vent holes enhance airflow, while soft microactive seams prevent chafing. With a streamlined fit, built-in stretch, and reflective details, it's perfect for high-output runs in warm conditions or layering at higher altitudes.

From £39.97 inc. VAT

Rab

Nitron 18

The Rab Nitron 18 is a lightweight and stable pack designed for fast-moving mountain adventures and minimalist day hikes. Its vest-style harness and flexible, body-hugging back system provide a secure fit, allowing for smooth movement across all terrains. With a sleek, modern design and easy-access pockets, it keeps your essentials within reach without slowing you down. Whether you're tackling technical trails or pushing the pace, this pack offers the perfect balance of comfort, stability and practicality.

From £75.50 inc. VAT

Rab

Veil XP 30

Designed for fast-moving mountain adventures, the Rab Veil XP 30 is a fully waterproof, 30L pack built for fast-packing, mountain marathons, and multi-day treks. With taped seams, waterproof fabric, and an IPX4 rating, it keeps your gear dry without the need for extra dry bags, making it an essential for unpredictable conditions. The breathable 3D mesh back system wicks moisture, flexes with your movement, and ensures all-day comfort, while on-the-go gear access lets you grab essentials without slowing down. Lightweight, durable, and streamlined for endurance - this is the pack for serious adventurers who refuse to be weighed down.

From £119.92 inc. VAT

Rab

Veil XP 20

The Rab Veil XP 20 is an ultra-lightweight, waterproof trail running pack that will help you defy the elements on fast-paced pursuits in unpredictable conditions. It features a roll top closure with a side buckle option that allows the pack to expand and compress as your kit changes, while fully taped seams and waterproof fabric will protect your kit in all mountain conditions. Rab's 3D mesh back system makes long distance runs more comfortable and you can attach your running poles via the front of the harness or in the side sleeves. The Veil XP is built for adventurous runners and fast hikers on serious long-distance missions.

From £111.02 inc. VAT

Altra

Women's Lone Peak 9+

The Altra Women's Lone Peak 9+ has been crafted for trail enthusiasts, equipped with a Vibram® Megagrip outsole that delivers outstanding traction on all terrains. Its enhanced midsole foam offers a responsive and comfortable ground feel, while durable no-sew overlays and a ripstop mesh upper withstand tough trails. Featuring Altra’s roomy toe box and Zero-to-Low Drop design, it encourages natural foot movement and long-lasting comfort. The Gaitertrap™ system prevents debris buildup, making this shoe perfect for high-mileage runs and challenging adventures.

From £115.82 inc. VAT

Altra

Men's Lone Peak 9+

The Altra Men's Lone Peak 9+ has been crafted for trail enthusiasts, equipped with a Vibram® Megagrip outsole that delivers outstanding traction on all terrains. Its enhanced midsole foam offers a responsive and comfortable ground feel, while durable no-sew overlays and a ripstop mesh upper withstand tough trails. Featuring Altra’s roomy toe box and Zero-to-Low Drop design, it encourages natural foot movement and long-lasting comfort. The Gaitertrap™ system prevents debris buildup, making this shoe perfect for high-mileage runs and challenging adventures.

From £115.82 inc. VAT

Altra

Trail Gaiter

The Altra Trail Gaiters are your ultimate shield against debris, ensuring nothing sneaks into your footwear while you run. Whether you're navigating through sand, snow, rocks, or leaves, these gaiters allow you to tackle tough terrains with ease, keeping pesky sticks and rocks at bay. Crafted from abrasion-resistant and highly breathable materials, they’ll elevate your trail running experience. With a strapless design that will fit trail shoes, you can switch shoes and socks without removing the gaiters. While they’re optimised for Altra GaiterTrap-equipped shoes, they will also work with most other trail footwear.

From £19.91 inc. VAT

Darn Tough

Women's Coolmax Run No Show Tab Ultra-Lightweight Running Sock

The Darn Tough Women's Coolmax? Run No Show Tab Ultra-Lightweight Running Socks are an ultra-lightweight sock that effectively wick moisture and keep the air flowing for vegan-friendly feet, keeping you cool and dry and your strides blister-free. They feature yarns made using Coolmax technology which works to wick sweat and regulate your temperature, keeping your feet in their comfort zone for miles.

From £17.82 inc. VAT

SPORTTAPE

Kinesiology Tape (K Tape)

SportTape Kinesiology Tape (K Tape) combines superior stretch, secure adhesion and skin-friendly comfort, making it the go-to for athletes and active individuals who need flexible support. Trusted by Olympians and World Champions since 2012, this flagship tape has been designed to move with muscles and joints, enhancing performance and aiding recovery. While not a miracle cure, K Tape is a powerful addition to a full rehab program. When used correctly, it can help relieve muscle pain, reduce inflammation, support tendons, improve body awareness and assist with posture, all to keep you moving confidently.

From £10.00 inc. VAT

Instinct

Endurance

The Instinct Endurance Cap delivers the ultimate blend of comfort and performance, making it your go-to for any adventure. Soft, ultra-light, and built for endurance, this cap features breathable micro-mesh fabric to keep you cool, plus a flexible, foldable design that’s easy to pack and take anywhere. With a stylish sublimated finish on both the top and underside and an adjustable elastic band with a secure clip clasp, it offers a premium look and fit that stays comfortable all day long.

£25.00 inc. VAT £22.27 inc. VAT

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