Trail Notes | Race Preparation

for the woman lining up for her first ultra

Your First

50 Kilometres.

Fifty kilometres is not just a longer marathon. It is a different conversation with your body, your pacing, your fuelling and your mind. The women who finish it well are not the ones who suffer the hardest. They are the ones who prepared honestly.

If you are reading this, you are probably somewhere between two thoughts. The first is, can I really do this? The second is, what do I actually need to know? This Trail Note is the honest answer to both.

A first 50km is not a final exam. It is a day-long act of decision-making, problem-solving and self-trust. The aim is not to be fearless on the start line. The aim is to be informed, equipped and prepared to make good choices, even when the day asks more of you than expected.

Trail Note  ·  01

Why 50km is its own kind of race

A marathon is hard. A 50km is hard in a different way. The extra eight kilometres at the back end change almost everything about how the day unfolds. You spend longer on your feet, often in single-track terrain or technical ground. You experience more variable weather. You have to fuel for longer, drink for longer, manage feet for longer, and stay mentally engaged for longer.

The difference is not so much the extra distance. It is what the extra distance reveals. Small choices made in the first hour, about pace, fuel, hydration, kit and effort, become very visible in the last quarter. A well-paced 50km can end with strength. A poorly-paced one can end with a long, slow march.

Neither outcome makes you a better or worse runner. But knowing what changes between a marathon and a 50km is the first step in racing it well.

Trail Note  ·  02

The training mistakes we see most

The most common mistake we see in first-time 50km athletes is not under-training. It is mis-training. Long runs that get too long too fast. Back-to-back days stacked before the body can absorb them. Strength dropped from the program the moment training feels busy. Recovery weeks skipped because the build feels good.

The second most common mistake is racing without rehearsing. Untested fuel. Untested pack. Untested shoes for that terrain. Untested race-day breakfast. The 50km finish line is a poor place to discover that your gut does not like a new gel, your shoes blister after thirty kilometres, or your pack rubs raw on the back.

The best 50km builds prioritise consistency over heroics. Steady weeks. Honest long runs. Strength held throughout. Recovery taken seriously. Race-day kit rehearsed on real terrain.

Trail Note  ·  03

What a realistic build looks like

A typical 50km build sits somewhere between sixteen and twenty-two weeks for a runner with a solid base. If you are coming back from injury, juggling significant life load, or building from a lower aerobic base, longer is usually wiser than shorter.

Notice what is missing. Heroic single sessions. Random long runs over four hours. Strength sessions sacrificed when life gets busy. A first 50km is not built on highlight reels. It is built on weeks that look quietly capable, stacked on top of each other.

Trail Note  ·  04

The longest long run does not need to be 50km

A common worry is that you have not run the full race distance in training. For a first 50km, you almost certainly should not. Most well-built ultra programs have a longest long run between thirty and forty kilometres, often combined with back-to-back weekends and supportive strength.

Why? Because the cost of running fifty in training before fifty in racing is high. Bigger recovery debt. Greater injury risk. A body that arrives at the start line already depleted from chasing the distance, not the adaptation.

Race-day fitness is built across a season, not in one big long run. Trust the back-to-back days, the cumulative volume, the strength and the taper to bring you to the start line ready.

Trail Note  ·  05

Fuelling for the first 50km

Fuelling decides finish lines. For a first 50km, you can hold an aerobic effort well within your capacity and still derail the day by under-fuelling. The most common error is fuelling like it is a marathon. The second most common error is starting too late.

Practical targets to aim toward, refined for your own gut over training. Sixty to ninety grams of carbohydrate per hour for the duration of the race, depending on tolerance and effort. Five hundred to seven hundred and fifty millilitres of fluid per hour, adjusted for heat. Electrolytes appropriate for your sweat rate, ideally tested across long, warm sessions.

Start fuelling early. Within the first thirty minutes. Set a watch alarm if you forget. The body cannot catch up on fuelling once it has fallen behind. Especially in the second half. Especially in heat.

Trail Note  ·  06

Pacing the first 50km

In a first 50km, the most expensive mistake is starting too fast. The legs feel fresh. The adrenaline is high. The runnable opening of many trail races whispers, you have plenty in the tank. Spend less than you think you can afford.

A useful internal rule, especially for first-time ultra athletes, is that the first hour should feel almost too easy. You should be capable of speaking in full sentences. Your breathing should sit clearly aerobic. Your heart rate should sit in a zone that you could hold all day, not just for thirty kilometres.

Walk the climbs deliberately, especially early. Walk with intention. Eat on the climbs. Hydrate at the top. Run the runnable sections steady, not hard. Let the race come to you.

Trail Note  ·  07

Kit, feet and the small things that decide the day

Big races are often won and lost in tiny details. Race-day kit should be tested, fitted and adjusted before the start line. Pack rubbed comfortably under a long run. Shoes worn on race-similar terrain. Socks tested for the duration. Anti-chafe applied generously. Period products planned for and packed.

Feet matter more than first-time ultra athletes expect. A small blister at five kilometres can become a race-ending blister at thirty. Stop early if something is wrong. Two minutes to fix a sock or re-tie a shoe at fifteen kilometres is much cheaper than limping the final twenty.

The same applies to layers, headwear, sun protection, hydration vessels and any mandatory kit. Race day is not the time to experiment. Race day is the time to execute what you have already practised.

Trail Note  ·  08

The mental shape of a first 50km

The mental arc of a first 50km tends to follow a familiar shape. The first hour is excited, sometimes nervous, sometimes a little anxious. The second hour settles. By three or four hours in, you will likely meet a quiet patch. Maybe a low patch. Maybe a flat patch. This is normal. This is not the day falling apart. This is the middle.

Most first-time ultra runners experience at least one moment of, why am I doing this? It is helpful to know in advance that this moment will probably arrive and probably pass. The work is not to avoid the low. The work is to keep eating, keep drinking, keep moving and keep making good small decisions until the next high arrives.

Many athletes describe the final ten kilometres of a first 50km as one of the most emotionally rich experiences of their lives. Tiredness, gratitude, surprise, relief and pride often arrive together. You will not need to manufacture meaning. The distance will deliver it.

Trail Note  ·  09

The aid station as a craft

Aid stations decide more races than people realise. Time spent there can be valuable or wasted. The goal of every aid station is the same. Refill what you need. Eat what your gut will accept. Address anything that is starting to go wrong. Leave with a clear plan for the next section.

Trail Note  ·  10

When the day gets hard

Hard patches are not optional in a first 50km. They are part of the experience. The aim is not to avoid them. The aim is to handle them well when they arrive.

When you start to feel rough, run the Her Trails race check before you decide anything dramatic. Have I eaten in the last thirty minutes? Have I drunk in small, regular sips? Am I too hot or too cold? Is my breathing controlled on easier terrain? Do I need to fix a piece of kit, change a product or address a niggle? Can I downshift for ten to twenty minutes, solve the basics and reassess?

Many bad patches resolve themselves once fuel, fluid and effort are recalibrated. Some do not, and that is information too. But do not write the end of the story while you are mid-chapter.

Trail Note  ·  11

The taper is part of the race

For a first 50km, the taper is one of the most under-respected parts of the build. Two to three weeks of reduced volume, maintained intensity for the first week, less terrain stress and more sleep. Race-week fuel rich in familiar carbohydrate. Hydration steadily emphasised. No new shoes, no new food, no new adventures.

Tapers often feel emotionally strange. Legs feel heavy, then light, then heavy again. Confidence ebbs. Doubts arrive. This is also normal. Trust the build. The taper is the bridge between the work you have done and the day you are about to meet.

Try not to evaluate your fitness on taper runs. Taper runs are not the test. Race day is the test.

Trail Note  ·  12

After the finish line

There is more than one truth at the finish line of a first 50km. Pride and exhaustion. Relief and disbelief. A small flatness in the days afterward that often surprises athletes who expected only euphoria.

Treat the days after with the same care as the days before. Eat well. Hydrate. Sleep. Walk gently. Allow emotion to arrive in waves. Do not rush back into training. Your body has just completed a long, layered, demanding day. Recovery deserves space.

And let the experience settle before you decide what is next. The right question after a first 50km is rarely, what bigger thing should I sign up for? It is more often, what did this race teach me about my body, my training and how I want to keep moving?

Trail Note  ·  13

The thing no one tells you

A first 50km changes you. Not because the distance is sacred. Because the process of preparing for it asks something different of you. You will have negotiated weeks where you wanted to skip the session and did not. Long runs where the only company was your own thinking. Moments where the body said it could not and the day said otherwise.

When you cross the line, you will not just have run further than you ever have. You will have collected proof. Proof that you keep agreements with yourself. Proof that you can plan, prepare and execute over a long horizon. Proof that you can hold yourself with curiosity rather than punishment when things go sideways.

That proof carries far beyond the finish line. It changes how you walk into the rest of your year. That, more than the medal or the time, is the gift of a first 50km.

prepare honestly, race steady, finish proud

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