One climb. Three times. That’s the race.

La Flèche Wallonne strips away everything that makes the other Ardennes classics complicated. Amstel Gold gives you 33 different hills to worry about, each with its own gradient and rhythm. Liège-Bastogne-Liège stacks long sustained climbs that test your threshold for five, six, seven minutes at a time. Flèche Wallonne? It gives you the Mur de Huy. 1.3km at 9.6% average, peaking at 20%, ridden in roughly 90 seconds at race pace. And then it gives it to you again. And again.

The 90th edition on April 22 will end the same way it always ends — on the brutal finishing straight that tilts skyward through the streets of Huy. The decisive move will happen on the third and final ascent of the Mur. Everything before it is prologue.

I learned this the hard way in my first Ardennes season. Came in with strong repeatability from Amstel prep — good at managing twenty punchy efforts across five hours. Figured that same fitness would carry me through Flèche Wallonne. The first Mur at km 130.8 felt fine. Sat in the group, spun up at tempo, recovered quickly. The second Mur at km 168 hurt more than expected, but manageable. The third? At the finish? I cracked at the 800-meter mark where the gradient hits its worst section, 19-20%, and watched riders I’d been sitting on all day ride away. My repeatability was built for 60-90 second efforts at 120-130% FTP. The Mur wanted 130%+ FTP for the full 90 seconds, three times, with the final one demanding everything you’ve got.

Close, but not the same effort. Not even close to the same training.

Quick Summary: La Flèche Wallonne 2026

Detail	Info
Date	April 22, 2026
Edition	90th
The climb	Mur de Huy: 1.3km, 9.6% avg, 20% max
Mur de Huy ascents	3 (km 130.8, km 168, finish)
Effort duration	~90-120 seconds per ascent
Top favorites	Evenepoel, del Toro, Pidcock
What it tests	Singular VO2max punch under cumulative fatigue

The amateur training lesson: Amstel trains repeatability across dozens of short climbs. Flèche Wallonne trains one specific intensity — 90 seconds at 130%+ FTP — repeated identically under increasing fatigue. The climb doesn’t change. Only you do.

Why Flèche Wallonne Is a Different Problem Than Amstel Gold

After training for Amstel’s 33 punchy tarmac climbs, it’s tempting to treat Flèche Wallonne as more of the same. It’s not.

At Amstel, the challenge is managing wildly different efforts: some climbs are 45 seconds, some are 2 minutes, gradients vary from 8% to 22%, and the spacing between them changes constantly. You’re an all-rounder. You calibrate each effort individually. The limiter is cumulative fatigue across diverse demands.

Flèche Wallonne collapses that into a single repeated test. The Mur de Huy is the Mur de Huy every time. Same 1.3km. Same gradient profile. Same 20% kicker near the top. The only variable is you, specifically, how much less you can produce each time you go up it. The race is designed to answer one question: can you reproduce a near-maximal 90-second effort after already doing it twice with 200km of racing in between?

Physiologically, that’s a VO2max repeatability problem, but it’s narrower than Amstel’s version. Amstel asks “can you punch 33 times at varied intensities?” Flèche asks “can you produce the same high-end punch three times, when the cost of each one rises?”

The distinction matters for training. Amstel prep builds a broad VO2max toolkit. Flèche Wallonne prep drills one specific interval until your body knows it cold.

What the Mur de Huy Actually Demands

How Hard Is the Mur de Huy?

The numbers, stripped bare:

1. Length: 1.3km from base to finish line
2. Average gradient: 9.6%, steep enough that you’re above threshold the entire time
3. Maximum gradient: 20% in two distinct pitches: one midway, one near the summit
4. Duration at race pace: 90-120 seconds for strong amateurs (pros do it in 80-95 seconds)
5. Estimated power demand: 130-145% FTP for the full ascent if you want to keep contact with a group, or survive it without blowing up on the third pass
6. Cadence: 65-80rpm for most riders. The gradient is too steep for high-cadence spinning unless you’re running a 34x34 or lower

That 90-second duration puts the Mur squarely in the VO2max power zone. Too long for pure anaerobic capacity (which lasts 30-45 seconds). Too short for threshold fitness to matter much. It’s a 90-second commitment to holding an intensity that your body is screaming to back off from. And the 20% ramp sections mean you can’t coast or soft-pedal through a bad patch. Ease up for even five seconds on a 20% grade and you’re practically stopped.

The critical piece: the climb is identical all three times. The gradient doesn’t change. The road surface doesn’t change. The only thing that changes is your body’s capacity to meet the demand. First Mur: 130% FTP is aggressive but doable. Second Mur: same 130% feels like 140% because you’ve been racing for five hours. Third Mur: that same 130% might be everything you have, or more than you have.

If you haven’t specifically trained for this degradation curve, you’ll discover it in real time. I did. It’s not fun.

The Training: Drilling One Interval

Most amateur Ardennes prep focuses on variety. Different climb lengths, different intensities, mixed sessions that simulate the diversity of a hilly road race. That’s good training for Amstel Gold. For Flèche Wallonne, you need something more focused.

You need to get very, very good at one thing: 90 seconds at 130%+ FTP. And then you need to practice doing it when you’re already tired.

Workout 1: The Mur Repeats

This is the core session. No creativity needed. Just the interval, repeated.

Structure:

• Warm up 20 min, progressive to zone 3
• 5 x 90 seconds at 130-140% FTP, cadence 65-80rpm
• 4 minutes easy spinning between efforts
• Cool down 15 min

RPE: First two efforts should feel like 8/10. Not easy, but controlled. Efforts three and four: 8.5-9/10. Effort five: 9-10/10. If effort five feels the same as effort one, you went too easy.

Why only five repeats? Because the race only asks for three, and the training stimulus comes from doing the interval at or above race intensity, not from accumulating volume below it. Five repeats at race-specific power beats ten repeats at 110% FTP. This isn’t an endurance workout. It’s a precision drill.

What to track: Power on repeat five vs. repeat one. A drop of more than 8-10% means you’re either starting too hard or your VO2max ceiling needs more work. Target: less than 5% drop from first to fifth.

I ran this session every Wednesday for three weeks. First week: 5% power drop by repeat four, 12% by repeat five. Third week: 3% drop through all five. The body adapts to a specific demand fast, especially when you’ve already built the aerobic base from zone 2 work and the general Ardennes block.

Workout 2: The Gradient Shift

The Mur de Huy doesn’t have a constant gradient. It ramps to 20% in two distinct sections, then backs off to 8-10% between them. That means your effort isn’t steady. It surges when the road steepens, then partially recovers on the “easier” (still 9%) sections. Training for that variability within the 90-second window matters.

Structure:

• 5 x (30 sec at 140-150% FTP + 60 sec at 120-130% FTP)
• 4 min recovery between sets
• The 30-second block simulates the 20% ramp. The 60-second block simulates the sustained steep sections between ramps.

RPE: The 30-second surges should feel violent, 9/10 from the start. The 60-second sustained sections are where discipline lives. You want to back off to 6/10 after that surge. Don’t. Hold 7-8/10. That’s the Mur: brief relief between steep pitches, but no actual recovery.

Total session time: About 70 minutes including warm-up and cool-down. Not long. Not supposed to be.

Workout 3: The Three-Mur Simulation

This is race-specific. You’re simulating the three ascents of the Mur de Huy at their approximate race spacing.

Structure:

• 2.5-3.5 hours total
• First 2 hours: zone 2 endurance. Fuel aggressively, 80g carbs per hour minimum. You need glycogen for the efforts.
• At 2 hours: First Mur sim — 90 sec at 125-135% FTP
• 20-25 min of tempo riding (85-90% FTP) to simulate race pace between Murs
• At ~2:25: Second Mur sim — 90 sec at 130-140% FTP
• 20-25 min of tempo
• At ~2:50: Third Mur sim — 90 sec at max effort

The key rule: The third effort must be at least as hard as the second. If you can’t match it, your pacing was wrong on the first two. Same mistake that costs riders in the actual race. The winner at Flèche Wallonne is almost always the rider who held back just enough on Murs one and two to be the strongest on Mur three.

RPE targets: First Mur sim — 8/10. Second — 8.5-9/10. Third — 10/10. Leave nothing.

After two sessions of this over the past couple weeks, something clicked. My third effort was actually stronger than my second, both times. Not because I got fitter between minutes 150 and 170, but because the third effort was all-out, no need to hold anything in reserve. There’s a psychological release when you know it’s the last one. Train that feeling. Know what it’s like to go empty on purpose.

A Three-Week Flèche Wallonne Plan

You’re bridging from Amstel Gold (April 19) to Flèche Wallonne (April 22). That’s only three days between races, so if you’re targeting both, the plan is really about the two weeks before Amstel and then managing the short turnaround.

If you’re targeting Flèche Wallonne specifically, here’s a standalone three-week block starting now. Assumes 7-9 hours per week and solid Ardennes base fitness.

Week 1 (March 29 - April 4): Identify the Effort

• Tuesday: Mur Repeats — 5x 90 sec at 130-140% FTP, 4 min rest
• Thursday: Gradient Shift — 5 sets of the surge/sustain combo
• Saturday: 3-hour endurance ride, easy. No intensity. This is recovery from the cobbled classics block and Amstel prep.
• Other days: Zone 2 or rest. You’re recalibrating, not building.

Week 2 (April 5 - April 11): Sharpen

• Tuesday: Mur Repeats — push to 135-145% FTP if repeat five held above 95% of repeat one last week. If not, stay at the same power and improve consistency first.
• Thursday: Three-Mur Simulation. Full 3-hour version with fueling practice.
• Saturday: 2-hour endurance with 3x 90-sec efforts at 125% FTP in the second hour. Not a big day, just keeping the top end present.
• Sunday: Watch Amstel Gold. Study the Cauberg attacks. Different race, but the VO2max repeatability data is relevant. Notice which riders are still fresh and filing those names away for Flèche three days later.

Week 3 (April 12 - April 22): Taper and Peak

• Tuesday: Mur Repeats — 4x 90 sec at 130-140%. Reduced volume, maintained intensity.
• Thursday: Gradient Shift — 4 sets. Crisp, not crushing.
• Saturday: Short Three-Mur Simulation — 2 hours total, three efforts, less endurance buildup. You’re testing legs, not building fitness.
• Sunday-Monday: Rest. Full stop.
• Tuesday (April 21): 40-min opener. 2x 30-sec hard accelerations, 1x 60 sec at sweet spot. Done.
• Wednesday, April 22: Race day, sportive, or your own Mur simulation.

The Pacing Trap Most Amateurs Fall Into

The almost-universal mistake at Flèche Wallonne (and in training for it) is overcooking the first Mur.

It makes sense. You feel good. The climb is only 90 seconds. How much can one 90-second effort really cost you? So you go at 140% FTP on the first ascent, feel strong over the top, recover well on the descent. Repeat on the second Mur, 135% this time, still solid. Then the third Mur arrives and you’ve spent 10-15% more energy than you needed on the first two passes. That deficit shows up as a power drop of 15-20% exactly when the race is being decided.

The winning formula is boring. First Mur: 125-130% FTP. Controlled. Sitting in. Second Mur: 130-135% FTP. A little more effort, but still disciplined. Third Mur: everything. 140%, 150%, whatever you’ve got.

The decisive move at Flèche Wallonne is almost always made on the final Mur. All prior riding — all 200km of it, including the first two ascents — is just burning matches before the only effort that counts. Train with that hierarchy in mind. The first two Murs are pacing exercises. The third is a race.

This applies to amateurs doing Ardennes sportives or any event with a repeated climb finish. Pace the early repetitions. Win (or survive) on the last one.

How to Watch the 90th Flèche Wallonne Like a Training Nerd

Five things to track on April 22:

1. Power distribution across three Murs. The broadcast won’t show power data, but watch cadence and body language. Riders spinning smoothly on the first Mur and attacking on the third are pacing correctly. Riders grinding from Mur one onward are in trouble.

2. Evenepoel’s positioning. He’s the overwhelming favorite, and he’s won this race before by attacking from 200 meters below the summit on the final Mur. Watch where he sits on Murs one and two. If he’s buried in the group, saving energy, he’s planning to detonate on Mur three. Classic puncheur strategy.

3. Del Toro’s third Mur. Isaac del Toro is 20, racing his first Flèche. Young riders at Ardennes races often go too hard too early because the effort feels manageable in isolation. Watch whether his third Mur is faster or slower than his first. That gap tells you everything about his maturity as a puncheur.

4. Pidcock’s cadence on the 20% sections. He comes from mountain biking, where steep kickers are natural terrain. If he can maintain 75+ rpm through the maximum gradient sections where others drop to 60, he’s got a mechanical advantage that compounds across three ascents.

5. Who attacks between Murs. Some riders try to break the race open on the roads between Mur ascents. This almost never works at Flèche. The Mur is the only selection point that matters. If a rider burns energy attacking on the flats, watch how they look on the next Mur. Usually cooked.

The Simplicity Is the Point

There’s something almost meditative about Flèche Wallonne preparation. You’re not juggling twelve different workout styles or simulating thirty-three different climbs. You’re drilling one interval. Ninety seconds. High power. Steep gradient. Do it, recover, do it again. See if your body can reproduce the effort when the account’s running low.

I used to think this kind of repetitive, narrow training was boring. Then I realized it was the only Ardennes classic where I consistently underperformed. My general VO2max fitness was fine. My specific Mur de Huy fitness — the ability to produce that exact duration at that exact intensity on that exact gradient three times — wasn’t trained. I was fit in a general sense but unprepared in the specific one.

Three weeks of focused Mur work changed that. Not because the workouts were complicated. Because they were precise.

April 22 is the 90th edition. One climb. Three ascents. The same 1.3km of road deciding the same race it’s decided for decades. Every other kilometer is just the commute to the bottom of the Mur.

Know the effort. Test your threshold. Calculate 130%. And go ride your nearest 90-second hill until you know exactly what it feels like to do it three times — because the third time is the only one that matters.

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Based on personal experience training for Ardennes-style repeated-climb events, and the specific demands of La Flèche Wallonne’s unique race structure. Race details from La Flèche Wallonne official race information and climb data from ProCyclingStats. Your Mur de Huy is any hill that takes 90 seconds at full commitment. Find one. Ride it five times. The first two will feel fine. That’s the trap.