Finding the route when the markers run out.

The route can ask you to do three different jobs

Following flags is one job. Following a path that already exists on the ground, such as a national trail, is another. Choosing your own line across open ground is a third. A race can mix them. A phone with a line on it does not decide which job you have been given.

Read the rule before you decide the route is “waymarked, so I will be fine.” Waymarks can be missing, facing the other way, or invisible in the dark. The skill is what you do at the junction where the next mark is not obvious.

A marked course still needs a plan for the gap

Centurion’s volunteer page describes the races as marked and fully supported, which is why they need large crews. That is a different event from one that sends you out with a map and expects you to stay on a trail by yourself.

Even on a marked course, save the route file the organiser actually issued, and know what you will do if you have not seen a mark for longer than feels reasonable. Turn back to the last mark you trusted. Guessing a shortcut is how a marked race becomes a navigation race you did not enter.

• Centurion: marked courses and volunteer crews
• Test the route file with the rest of the kit

“Follow the Pennine Way” is a navigation instruction

The Montane Winter Spine 2027 terms say you must stay on the Pennine Way unless the organiser diverts you to a checkpoint. If you get lost, or make a significant navigation error and gain an advantage, you may get a time penalty. The same terms say you may need basic navigation and map and compass reading.

The race page is plain about the standard. It is not a beginner event. You need to be 21 or over, and the organisers want mountain, moorland or navigation experience before they take the entry. January on that route has about eight hours of daylight on their figures. A lot of the following happens in the dark.

That is the pattern to recognise. A famous trail can be marked and still be a place where skilled people leave the line. Your rehearsal is the moment you notice you have left it, and the route you take to get back without inventing a faster one.

• Winter Spine 2027 terms: stay on the Pennine Way
• Winter Spine 2027: not a beginner race
• Winter Spine profile

Practise on a path you already know

Ordnance Survey’s beginner guides cover symbols, contours, distance and grid references. Their map-reading booklet says to start with a short route in a familiar area, take a map and compass, tell someone where you are going, and practise before you rely on the skill somewhere new.

Pick a junction on a local path. Walk to it using the map, with the phone in a pocket. At the junction, name the path you want before you look up. Then turn around and find your way back to a point you chose in advance. If you only ever follow a line that beeps, you have not yet done the job a self-navigated race will ask for.

Do this in daylight first. If the race will include darkness, repeat a short version with the light you will actually carry, on a route where getting it wrong means a gate, not a fell.

• Ordnance Survey: beginner map-reading guides
• Ordnance Survey: map reading booklet

Match the practice to the race

Tick these against the instructions for your edition. A tick means you have looked, not that you are competent to cross a mountain in the dark.