Thinking of running a trail marathon?

Find all our advice for your next race, equipment, training... We have put together everything you need to be ready on the start line.

A message from our athletes

Running a trail marathon is the first step before moving on to Ultra. Read the advice of Dorian Marchal and Alvin Lair, two young RaidLight athletes.


How much training volume? How far? Find a training plan to prepare for a 42 kilometre race with tips to be ready for the big day.


RaidLight offers equipment for trail runners from head to toe, whether you are a beginner or an expert.

Some words from our Team Members

What I like about these formats is that you can run all the way through, recover from the races pretty quickly and not need to do too much training to finish them. And at the same time it's already a format that requires careful race management, including nutrition / hydration level, we are never at full speed except at the very end and it allows you to really enjoy the fast descents without taking too many risks and enjoy the view at the top, these kinds of little things that make the trail very special.

On the shorter races, I am unable to look at the view at the top and in general there is not enough distance to have really varied or high elevation courses if we start from the valley. Also, the marathon formats are for me those where the competition level is higher and the races are larger numbers of entrants which satisfies my competitive side!

But beginner or expert it's a complete format that takes the best aspects of shorter trail races and longer ultra races!


Your first 40km? Make sure you learn from plenty of shorter races first.You have to prepare for a 40km, you have to adapt your training and above all do not miss sessions! You need to build your training (do not go from one session per week to four but build gradually) and first some shorter distance races to learn from (15km, 20km, 30km). Do not get ahead of yourself. Choose a trail race or location that has a special meaning for you, because of its history or landscape ... It will be a source of motivation to finish




Remember to look at the total elevation and elevation profile of the race in order to prioritise your training accordingly. If the course is rolling (fairly flat), do sessions on flat ground to acquire maximum speed. If on the contrary the course is very steep, do sessions on hills instead. In short, you should train as much as possible on the type of terrain and/or the altitude difference of the course.


A little advice, fill up on carbohydrates one week before the event by eating mainly rice and pasta. During the race, the idea is to eat small but regular amounts. Personally, I regularly use the gels every 45 minutes. Also remember to vary the tastes between salty and sweet so as not to be disgusted. As far as drinks are concerned, it's a bit different, you need to hydrate as well and as often as possible.


For these distances, remember to look first: the weight - the comfort - the practical side. Choose according to the temperature and time of day of the race. RaidLight tops and legwear come with pockets for additional storage. Maybe arm sleeves and a short sleeved top is better especially on an early start. Legwear, shorts or 3/4 are most versatile. A jacket is important to carry (often mandatory), it must be very light and small pack size because on these distances there is more chance of big technical elevations and weather changes.

Running Pack / Race Vest

2 bottles are better than one. On longer races you can tire of the same taste, this allows you to mix, or just use plain water. Make sure you can fit all the mandatory kit comfortably, a bulging race vest can be uncomfortable and more complicated to get things easily. Our 3 ranges offer the expert, the competitor and the novice exactly what they need.

Trail Running Shoes

Choose wisely. Fit and comfort and the most important thing in footwear. Make sure you assess the terrain and the shoe you want to use has enough tread, support, cushion for you. Our XP and Ultra shoes are more suited to harder ground, where the Dynamic and Revolutiv shoes suit more varied terrains and are better in soft ground/mud.


3-4 sessions per week

1 x 12-week phase

- 1 x VO2 max aerobic session(VMA) - 1 x general physical development (GPP), educational (PPS), hills - 1 x aerobic endurance session, with specific pace reminders