What Spate Actually Means on a British Hill

Spate is the word we use when a beck, burn or ghyll has risen hard and fast after rain. On British hills the catchments are often tiny and steep, so the response to weather is quick and dramatic. A stream you hopped over in boots and bare hands on the way up can be a loud, brown torrent two hours later on the way down. That is the classic accident pattern in the Lake District, Snowdonia, the Pennines and the Scottish Highlands: a fine morning, a wet afternoon, and a return leg beside water that has come up while you were on the summit.

Rain does not need to fall on your head to put your path in spate. It may have fallen two valleys over an hour ago. Saturated ground sheds water almost instantly, and peaty burns turn the colour of stout within minutes. Treat every crossing as a fresh decision, not as something you have already done once today.

Reading the River Before You Commit

Stand back and look properly, for at least a minute. The water is telling you nearly everything you need to know.

• Width and depth: the widest, shallowest line is almost always best. Braided channels across gravel are ideal.
• Bends: the outside of a bend is deep, fast and often undercut. Cross on the inside.
• Falls and gorges: never cross directly above a waterfall, weir or narrow gorge. A slip there is not recoverable.
• Surface: smooth, glassy water usually means depth. Broken, choppy water means boulders and uneven bed.
• Debris: branches and twigs in the flow mean strainers further down, and rising water upstream.
• Level: watch a fixed stone or the bank edge for a full minute. If it is still climbing, that settles it.

Look at the far bank too. It is no good finding a perfect crossing point if you cannot climb out the other side.

Kit and Body Prep: The Two-Minute Routine

Before your boots touch the water, get your kit right.

• Unbuckle your rucksack. Undo the waist belt and the sternum strap, and slip one shoulder strap off. If you go in, you need to be able to shed the pack with a single shrug.
• Keep your boots on. The old advice to cross barefoot belongs to warm, sandy rivers. On a rocky British bed, boots give grip, warmth and protection.
• Use a pole or stick. A trekking pole planted upstream makes a third point of contact. Never use the wrist loops in fast water — if the pole jams, you do not want your arm attached to it.
• Waterproofs on. Not for the rain, for the warmth. Pack spare layers, hat and gloves in a dry bag.
• Group of four? Form a line or wedge facing upstream, gripping the person in front by the shoulder strap or waist, strongest walker on the upstream side. Keep the steps small and in rhythm.
• Cold, tired, late, alone? All four are reasons to be stricter, not braver.

The Crossing Technique That Keeps You Upright

Face upstream and move sideways, so you can see what is coming at you. Step one foot at a time, and do not cross your legs. Keep your knees soft, weight over your feet, and plant the pole upstream before each step. Slide your feet along the bed rather than lifting them — a lifted foot in fast water is a foot you no longer control, and the current will take it.

Aim slightly downstream as you go, working with the flow rather than pushing against it. Look at the far bank, not down at the water, which can make you dizzy and tempt you to over-correct. If the bed is loose gravel, you will feel it shifting under your soles. That is a signal to retreat, not to hurry.

Turning Back: The Skill Nobody Brags About

There is a workable rule of thumb used across British mountain rescue teams: for most adults, water above the knee in a fast flow is the limit. Add a heavy pack, tired legs or cold hands, and that limit drops sharply.

Turn back if any of the following is true:

• Water is above your knees, or above the top of your boots, and moving quickly.
• You cannot clearly see the bed through the water.
• The level has risen while you watched it.
• You would be crossing above a fall, gorge or fence strainer.
• You feel you have something to prove.

Turning back is not a failed day. It is a decision you get to make again tomorrow, which is the whole point. Walk upstream or downstream to find a bridge, a wider braided section, or a road; or simply take the long way round and change the plan.

If It All Goes Wrong

If you do end up in the water, go feet first and downstream on your back, with your feet high and pointing down the flow to fend off rocks. Do not try to stand up in fast water — your foot can wedge in the bed and the current will push you under. Stay away from fallen trees and branches: strainers will trap you and hold you down, so swim for the nearest safe bank, even if it is upstream of your original exit.

Once out, get out of the wind immediately, strip wet layers, put on dry kit or get into a bothy bag or survival shelter, add a hat and gloves, and keep moving. A hot drink helps, but warmth and shelter matter more. Then walk out by the easiest route you have, and save the rest of the day's hills for another time. The river will still be there, and so, with a bit of care, will you.