Altra

Mont Blanc Speed

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Altra Mont Blanc Speed

Overall

#581 in

Trail Running Shoes

according to Reddit Icon Reddit

User sentiment25% positive
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5
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Top Pros

Top Cons

Last updated: Apr 6, 2026

Reddit Reviews

Reddit IconFizzywater10 1.0
r/UltramarathonHow many different pairs running shoes did you use this year?
3 months ago

2x altra lone peaks. 2x topo mtn racer 3s. 1x altra Mont Blanc speeds. 1x MTC H1s. 1x altra vanish tempo. 1x topo specter 2. Still using 4 of those but a couple are pretty close to dead. ~2500 miles.

r/UltramarathonHow many different pairs running shoes did you use this year?
2 months ago

Absolutely. I got the MBS specifically for a super technical 100 miler. They performed great got through the whole race with minimal foot issues. They are however not that durable showing significant wear after ~200 miles. really liked the mtn racers but they started biting my feet on the inside edge after awhile so I’m out on those now. I also considered prodigio pros but never tried them on due to the same width concerns. If your race is not muddy or loose rocky I’d also recommend H1s. I haven’t taken them on anything super technical yet but am liking them a lot. ~300 miles on em in 2 months including a 40 mile race in the snow.

Reddit IconHammertimePT1855 1.0
r/trailrunningFaster Shoe Comparable to Topo Ultraventure 4 (Wide) Fit
3 months ago

If you wear wide Lone Peaks, then you are stuck with what you have currently. I am in the same boat as you and the LP9+ are my daily driver. I use the Mont Blanc Speed for intervals or more uptempo workouts but had to switch to elastic Lock Laces for more volume and get used to my midfoot spilling over the medial arch (my brain has forgotten about it after a month or so).

Reddit Iconmw_19 1.0
r/trailrunningVersatile trail running shoes
7 months ago

Sleeper shoe that is super versatile is the Altra Mont Blanc Carbon … can do it all and it’s a much snugger fit then most altras and durable … I run east coast terrain and 100k ultras in them. They have a new Mont Blanc Speed without carbon that’s a bit softer but not as propulsive…

Reddit IconOk-Original2510 1.0
r/trailrunningJack of All Trades, Master of None: Shoe Recommendation
10 months ago

I run in Altra lone peaks and have been for about 7 years. I have recently added the new Altra Mont Blanc speed into my rotation. I just ran and finished the Sedona canyons 125 and did the first 50 miles in my lone peaks and the last 75 miles in the Mont Blanc speeds. No issues.

r/ultrarunningShoe advice for 100 miler (Altra/Topo guy)
9 months ago

In May I ran and finished the Sedona Canyons 125 (back half of cocodona 250). I ran the first 50 miles in the Lone Peak 8 and the last 75 miles in the Mont Blanc Speed. The MB speed has a stack of 29mm which is 4 mm higher than the LP. Was nice to have a little more cushion for the later miles. No feet or toe issues.

r/ultrarunningBlister Prevention
11 months ago

All solid trail shoes for sure. Maybe it’s the socks. I run in Altra Lone Peak. And have recently added Altra Mont Blanc Speed (it’s a newer shoe). And Balega Hidden Comfort socks. REI is an outdoor retailer here in the States. I know wool is good but it never work for me. Balega uses nylon and synthetics and polyester. It works for me. Wool causes my feet to slide in the shoe.

r/UltramarathonSedona Canyons 125 – 2025 race account
11 months ago

Congrats! I was also there, and finished! It did take me a bit longer than you though, about 10 hours longer. Your recap is spot on for description of each section. Unfortunately I did have to navigate Hangover in the dark and it sucked. Course markings on Hangover were a little sketchy and then add in darkness, it was tough. But overall I agree with everything you said. I felt the same in just about every way you did. It was pretty amazing out there. I ran in LP 8s for a while too. Then switched to the Mont Blanc Speed.

Reddit IconPrestigious-Eye3154 1.0
r/trailrunningAltra gives up the ghost
4 months ago

I just bought a pair of these and I noticed the fabric on the insoles was already peeling on the edges, brand new out of the box. Seems like an ill omen for long term use.

Reddit Iconpurr_ducken 1.0
r/ultrarunningShoe advice for 100 miler (Altra/Topo guy)
9 months ago

Great shoe but it'll beat your feet up on a hundo if you're not accustomed to it. I recommend Mont Blanc Speed or new Timp. 

Reddit Icontitan_master_class43 1.0
r/trailrunningAltra gives up the ghost
4 months ago

I just took a picture of my MBS ripping in the exact same spot. Only 200 miles. Wish altras would last longer

Reddit Iconwhere_other_sock 1.0
r/trailrunningAltra gives up the ghost
4 months ago

I’ve been running in Altra trail shoes for several years now after switching over from Salomon S Labs (they were getting to hard to find). The Lone Peak was my go-to, and I often saw folks writing about them falling apart. I never had an issue… until I decided to try and “upgrade” to the Mont Blanc speed in April. Yesterday mid run the whole side tore out!! Fortunately I got them at REI, and I will see if I can return/exchange them. I love the Altra toe box, and the gator ready design of the shoe - but I’m now worried about going back to the Lone Peak!

Reddit IconThink-Geologist-1244 0.5
r/trailrunningAltra gives up the ghost
4 months ago

Same thing happened to my speeds at just over 200 miles, REI took them back. I've been in Altra for a few years but starting the transition to something more durable. I'd get 200 miles out of most pairs and they'd either fall apart or I'd start to get these little injuries.

Reddit Iconyetiblue1 0.5
r/trailrunningFaster Shoe Comparable to Topo Ultraventure 4 (Wide) Fit
3 months ago

You’d be hard pressed to find another shoe that is faster and as wide. Best suggestion would be to get the FKT insoles from Topo for a bit more energy return and get faster ™️ Or potentially the Altra Mont Blanc speed/carbon. They’re pricy though and potentially not enough volume. They do run faster than anything Topo has atm