Hydration on the Trail: Bottles, Packs and Mix

How you carry water matters almost as much as how much you drink. Match your setup to the length and heat of the ride, and plan your refills.

Drinking enough on the bike is simple in principle and surprisingly easy to get wrong in practice. The trick is to carry water in a way you will actually use, and to plan refills before you are dry.

Bottles versus packs

Frame-mounted bottles are light, cheap and easy to clean, and two cages on a full-suspension frame cover most short rides. A hydration pack carries more water, keeps your hands free and lets you sip without reaching down, which helps on technical trails where taking a hand off the bar is awkward.

• Short ride, smooth trail: one or two bottles is plenty.
• Long or hot ride: a pack or a bottle plus a pack covers the gaps.
• Technical trail: a pack keeps you sipping without losing control.

How much to drink

Thirst is a reasonable guide for most rides. On long or hot days, sip regularly rather than waiting to feel parched, and start the ride hydrated. Carrying more than you need slows you down; carrying less than you need ends a ride early, so know your route's refill points.

Plan your water around the terrain, not your optimism. A climb with no shade drinks more than the map suggests.

Electrolytes and mix

For rides under an hour, plain water is usually enough. On longer or hotter rides, a drink with electrolytes replaces salts lost through sweat and can improve how you feel near the end. Some riders prefer to keep one bottle plain and one with mix, which also keeps the plain bottle clean for rinsing a wound or clearing grit.

Care and cleaning

Bottle and bladder hygiene matters more than most riders think. Rinse bottles after every ride, wash bladders and hoses regularly with warm water, and dry them fully before storage so nothing grows inside. A bladder left with mix in it will make the next ride taste wrong and can make you unwell.

Carrying comfort

Load a pack close to your spine with the heaviest items high and the straps snug, so it does not swing on descents. On very rough trails, some riders prefer bottles on the frame and a small hip pack to keep their back cool. Whatever you choose, fill and clean it the same way every time so nothing is forgotten.

Good hydration is boring: carry enough, drink often, and refill when you can. Do those three things and the rest looks after itself.

Frequently asked questions