Start with the ground under your feet

A day on the British hills rarely serves up one surface for long. You might start on a stone track, cross a stretch of limestone pavement, slog through a peat bog, then finish on wet grass with a boulder field in the middle. No single boot is perfect for all of it, which is why the useful question is not "what is the best boot?" but "what does most of my walking actually look like?"

For most people heading out in the UK uplands — the Pennines, Snowdonia, the Lakes, the Scottish hills — that means a boot with a reasonably stiff sole, good grip, a bit of height above the ankle, and a waterproof lining. It weighs a little more, but it will still be comfortable when you are picking your way down a loose scree path in the rain.

Ankle support and a sole that grips

The value of a stiffer boot shows up on uneven ground. A supportive midsole spreads the load across your foot and stops sharp rocks poking up through the sole, which matters over long distances on broken ground. It also resists twisting, so when you land on a rock edge with one foot, the boot holds its shape rather than folding sideways.

Ankle height is a related but separate point. A deep cuff does not immobilise your ankle, but it does add a little protection against rolling on tussocks and stops grit and heather seeds getting in. On wet peat and grassy descents, that low-level stability is worth having.

Grip comes down to the rubber compound and the pattern of lugs:

• Deep, widely spaced lugs shed mud and grip soft peat and grass well.
• Shallower lugs with more rubber on the ground suit rock and mixed paths, but clog quickly in bog.
• A defined heel brake helps on steep, wet grass where slips happen most often.
• A slightly softer compound grips wet rock better but wears faster on long track walks.

Water, bogs and the wet-grass problem

Peat bogs are the classic UK test. You will not keep water out if you stand in a bog hole above boot height, but a waterproof membrane plus a full-grain leather or robust synthetic upper will handle splashes, shallow pools and wet grass for hours.

Leather uppers are heavier and take more looking after, but they resist abrasion from heather and rock and mould to your foot over time. Synthetic and fabric boots are lighter, dry faster if water does get in, and often need less breaking in. If you walk a lot in the hills on wet days, a boot with a leather or nubuck upper and a waterproof lining is a sound compromise.

Two small additions earn their place. A pair of gaiters keeps peat, heather and cold water out of your socks and trousers. And a boot with a decent toe bumper will survive years of kicking into rock steps and stiles.

Fit matters more than any specification

You can buy the most capable boot in the shop and still have a miserable day if it does not fit. Feet swell during a long walk, so try boots on in the afternoon or evening, and try them on with the socks you intend to wear on your longest days — not thin dress socks.

Things worth checking before you commit:

• Toe room: your toes should not touch the front. Aim for roughly a finger's width of space so your toes clear the end on descents.
• Heel hold: your heel should lift no more than a few millimetres. Excessive lift causes blisters, however soft the lining.
• Width: if the boot presses hard across the widest part of your foot, it will hurt after ten miles. Look at wider fits rather than sizing up.
• Uneven ground test: walk up and down stairs or a slope in the shop. Better still, wear a loaded pack.
• Both feet: most people have one foot slightly larger. Fit the bigger one.

Women's boots are usually built on a narrower last with a different heel and instep shape, but fit is individual. Ignore the label and trust your feet.

Socks, lacing and small adjustments

A single pair of merino or synthetic socks is enough for most days; cotton holds water and causes cold, blistered feet. If you blister easily, a thin liner sock under a thicker outer sock reduces friction.

Lacing technique makes a real difference on rocky ground. Use a heel-lock — cross the laces, take each end back through the loop on the opposite side, then pull tight — to hold your heel down. Keep the forefoot lacing slightly looser so your toes can spread. On long descents, stop and loosen the lower laces; on steep climbs, tighten them. Re-tie after the first mile, once your feet have settled.

Breaking them in and keeping them going

Leather boots need a few short walks before a big day out — an hour on local paths, then a half-day. Do not attempt a twenty-mile hill day in a brand-new pair. Synthetic boots are usually ready sooner, but a gentle first outing still helps.

After a walk, rinse mud off with cold water and a brush. Dry boots slowly at room temperature, away from radiators, fires and hot cars, which crack leather and delaminate soles. When the leather starts to darken and soak up water rather than beading it, clean and reproof it. Replace the footbed when it goes flat, and check the rand and toe bumper for splits before winter. Looked after properly, a good pair of boots will carry you across a lot of peat.