
Mount to Coast
H1
Versatile road-to-trail, but struggles on wet, technical downhills.

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I've been thru Topo Hydroventure, Ultraventure 1/2/3, MTN Racer 1/2/3/4. The UV3's lost the outer/lug grip plot, the MTN3's felt like running in floppy support-free canvas bags (the MTN4's are a return to form). I haven't tried the Vistas yet. What I'm concerned about with the Vistas is catching little rocks in that split heel just like Saucony Peregrines do. Did you experience this in your run test? Other than that, the lugs are the same as the MTN4's, right?
I use Topo MTN Racer shoes. In Australia they're not cheap, but no more than all the other brands. Uphill running is just hard work. Don't try to race it (yet) just short steps and grind your way up. Yes your legs and lungs will burn, but that's the overload that is necessary to get the strength and fitness. Downhill running needs care and technique to avoid injury from falling. Run with short quick steps. Try not to put the brakes on to slow yourself because that actually needs MORE traction, which is in limited supply on steep hills. You have to run with gravity a bit. It's scary. You need the short steps so you can change direction to dodge bad spots or find the less slippery spots. Good luck! Enjoy your trail running, it's worth it!
I get 1200km out of Topo Mountain Racers before the Vibram has lost most of its grip
This is my experience with Topo as well. I have tried the Terraventure 3, Ultraventure 4, and MTN Racer 2. The Terraventure held up the best but are a very low cushion shoe compared to the others. But the others both fell apart too quickly.
That's weird. My terraventure 2 lasted 1000+ kilometers, mtn Racer 2 ~900km and also had the mt-5 that also lasted for 700km or so. I currently have the mtn Racer 4 and no issues so far (although they only have 100km)
La sportiva prodigios. Spacious toe box, deep heel cup, plenty of cushion but a firm ride, and great traction like all la sportiva shoes. My holy grail. The topo mtn racers are nice too
Topo Athletic MTN Racer - 5mm drop, foot shaped with a huge toebox, vibram, mid-high stack, not the lightest but very durable and versatile. They also have 3 and 0mm drop shoes in the lineup. Otherwise would look at Inov8, Scarpa, Salomon. Scarpa Ribelle Run or similar could be good although I haven't tried them. Or Salomon Thundercross. If you get on with zero drop then Inov8, maybe Altra.
Same here. The fit is very similar between the two.

Mount to Coast
H1
Versatile road-to-trail, but struggles on wet, technical downhills.

Altra
Lone Peak Series
Spacious toe box, but cushioning and durability are polarizing.

La Sportiva
Prodigio Series
Great technical grip, but unstable for some, with sizing issues.

Nike
Pegasus Trail Series
Versatile for non-technical trails, but poor on wet, technical.

Mount to Coast
T1
Lightweight, cushioned; but lacing and underfoot protection are issues.

Ranked #1
Salomon - Speedcross Series

Ranked #1
Hoka - Speedgoat Series

Ranked #1
Mount to Coast - H1

Ranked #1
Salomon - Genesis Series

Ranked #1
La Sportiva - Prodigio Series

Ranked #1
Mount to Coast - H1