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Mettle

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Chamonix-Mont-Blanc, Auvergne-Rhône-Alpes
Mettle

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Trail and ultra running coaching to help build your physical endurance and mental strength. Take your running to the next level.

Get the results that matter to you.

22/10/2026

Safety pins. We use them to attach race numbers to our tops and running vests.

You’ve seen photos from the UTMB start line in Chamonix with around 2400 runners waiting to run through town and begin their journey around Mont Blanc.

Among them was Nadia. With less than 30 mins to the start, the zip on her running vest broke. I know, right?!

With no safety pins, she wrapped a black bag she’d found on the floor around her pack. Genius move. I then headed to the first crew-accessible aid station, Les Contamines, with one of my packs to swap with hers.

Today’s tip: carry a few safety pins. You never know when you may need them.

Love and Mettle,
Kaz 👊

Photos
1. Maria’s red pack. Her vest zip broke a few years ago, and I remembered her photo. Way to go Mazza Russell

2. Nadia’s safety pins. She’s racing in Italy this weekend and sent me this photo. She is ready! Have a great race Nadia Portelli

3. My running vest, complete with safety pins Dr Kaz Williams

Find ways to

21/10/2026

2026, we’re still packing in the training and racing.

Woody had a fantastic race at Ultra Kotlina 50 in Poland recently. A fast 58K trail race with 2100m+

After the big mountain climbs of Swiss Alps 100, 50K race in August, we switched up training to reflect this more runnable course. Woody continued to work on his nutrition during his long runs in the Scottish hills, as well as developing a clear pacing strategy.

We’ll chat more about pacing in another post as bringing awareness to this can help with confidence during specific moments in a race, as well as learning to trust yourself and the training you’ve done.

Great running Woody! Congratulations 💪

Love and Mettle
Kaz 👊

PS Woody has form for…let’s say missing a turning and having to double back on himself when racing. When I asked him after the race how it went, his comment was priceless:

“At least I didn’t get lost this time.” 😂

Photos: Erica Clarkson

13/10/2026

The TAR race series in September is a fabulous local event ⛰️

You need your mountain legs from the get-go! It’s about finding your rhythm, managing your effort, and keeping moving forward. One step at a time.

Big shout-out to Jean-François, who ran a strong P’tit TAR, 18K with a bold 1,350m of elevation gain.

Way to go!

Love and Mettle, Kaz 👊

Jean-François Coquoz Trail des Aiguilles Rouges

22/05/2026

The Eat Sleep Think lineup just got even better 💛

Emma, founder of .eu will be with us throughout the event. Because great recovery is part of the process too.

Head to recoverybalm.eu/en to discover her products before the day.

See you at the event!

Love and Mettle,
Kaz 👊

Photos: .eu

19/05/2026

Thank you to our fantastic support partners for making Eat Sleep Think possible 💛

Yoga Mountain Run
Grateful for your support. Quick shout out for their Pyrenees trip from 2nd-6th October. DM .mountain.run for an early rate available until 15 June.

Chamonix Body Therapy
Super excited for Suze and her new functional fitness classes which focus on strength, stability and alignment. To find out more follow

Les 2 Marmottes
Tea that makes you smile

Really appreciate you all!

Love and Mettle,
Kaz 👊

yoga mountain run photos by .photographer

12/05/2026

What would you choose?

Love and Mettle,
Kaz 👊

04/05/2026

This is why we do what we do. We love seeing where our athletes run long at the weekend. Thanks for the share Emilie!

Keep exploring ⛰️

Love and Mettle,
Kaz 👊

Trails: Mount Charleston, Nevada

02/05/2026

No shortcuts. No hiding. The trail shows you exactly who you are.

I built Mettle to support runners who want to explore their potential, and Wednesday night reminded me exactly why.

Great fun at Big Mountain Trail Club run, catching up with friends and making new ones.

And the raffle? Legendary status!

Thrilled to announce that Big Mountain are an Official Partner of Eat Sleep Think and two lucky winners will be at our workshop on 23 May ✨

Love and Mettle,
Kaz 👊

PS Event link in bio. Hope you can make it too!

23/04/2026

This is what a well-executed race looks like.

Coffee in a gorgeous race mug (lush race swag Traprock!) and post-run bliss with Hoka’s Recovery Slides for some foot TLC.

Janet finished Traprock 50K at the weekend. Three loops over technical terrain, and she stayed strong and steady all the way through.

In the past, Janet has had fueling issues, which we’ve been working on. Saturday she nailed it!

Consistent energy, dialled hydration and electrolytes on point, which is all great practice for the bigger races she has ahead.

Way to go Janet! 🔥

Love and Mettle,
Kaz 👊

PS Still guessing your race-day nutrition? Let’s fix that at Eat Sleep Think, Chamonix. Link in bio ⬆️

16/02/2026

Winter training from Rhode Island, Malta and Chamonix.

1. Rhode Island: Beach path buried in deep snow

2. Malta coastline: Epic wind delivering Sahara sand

3. Chamonix: Balcon Sud with an avalanche on the trail

Thank you for sharing your trails with us Janet, Nadia and Jean-François 🙏

Love and Mettle,
Kaz 👊

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Chamonix
74400

Site Web

http://www.mettlerunning.com/

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