Spring 2026 is a notable season for trail footwear. Nine models have launched or are launching in the first half of the year, spanning Hoka's rebuilt flagship, Kilian Jornet's brand going mainstream, race-day super shoes, and a max-cushion option from a European brand making its US debut. Here's what's out there.
Nike ACG Ultrafly 2
- ZoomX energy return on long climbs
- Vibram Litebase outsole for nimble grip
- Wider trail-specific last for swollen feet
- Race-validated at WSER distance
- Premium price point
- Limited availability at launch
- May be too responsive for slow/technical terrain
The original ACG Ultrafly earned its reputation the hard way: Caleb Olson wore a prototype to win Western States. The version 2 adds a redesigned, split-spine carbon FlyPlate that's less rigid than its predecessor, allowing the forefoot to flex over roots and rocks, while retaining ZoomX foam and the Vibram Litebase outsole. The 4.5mm lugs are versatile enough for hardpack and soft dirt without the energy penalty of aggressive mud knobs.
This is the shoe for runners who want road-shoe energy return without sacrificing grip. If you're racing something long and mountainous this summer, the Ultrafly 2 belongs on your shortlist.
On Cloudsoma
- Completely new traction concept from On
- Independent pods adapt to uneven ground
- Strong pedigree from On's trail line
- Spring launch timing ideal for summer training
- Unproven design, no long-term data yet
- Pod system may not suit heavy mud
- Pod system relatively unproven at ultra distances
The Cloudsoma launched in April 2026 with On's first genuinely new traction platform in years. Instead of a continuous outsole, independent traction pods flex to match the foot's natural movement as it lands and rolls across uneven ground. The concept addresses a real problem: rigid outsoles don't adapt to variable terrain, which forces the foot to compensate. Early reviews are positive for technical trail feel; longer-term durability data is still accumulating.
Race planner tip: If you're buying a new shoe for a race, build at least 4–6 weeks of training miles into them before race day. Novel designs like the Cloudsoma deserve extra break-in time to assess fit under fatigue.
Brooks Cascadia Elite
- Carbon propulsion in a familiar Cascadia chassis
- Built for FKTs and race podiums
- Trusted Cascadia upper and fit system
- Replaces the Catamount with better fit heritage
- $275 is premium tier pricing
- Carbon plates add fatigue on very long days
- Not the right choice for casual training
Brooks' first entry into the plated trail super-shoe category uses a carbon-infused Pebax SpeedVault+ horseshoe plate, not a full carbon plate, which actually works in its favor on uneven terrain where rigidity becomes a liability. Sandwiched between layers of DNA GOLD 100% PEBA foam with a ~40mm heel stack and Vibram Megagrip Elite outsole, this is a legitimate race tool. At $275, it's clearly positioned as a race-day-only shoe. Save it for events where the propulsion return justifies the investment.
Adidas Terrex Agravic Speed Ultra 2
- 13g lighter than v1 with improved fit
- Softer Lightstrike Pro midsole, not just a refresh
- Continental Rubber outsole with 4mm lugs
- Available since December 2025, ready to train in
- Extremely narrow rear platform, favors midfoot strikers
- Speed-focused; not built for technical scrambling
- Narrow fit may not suit wide feet
The Agravic Speed Ultra 2 is a substantive update: softer Lightstrike Pro foam, a redesigned upper with improved ankle collar geometry, and a 13g weight reduction down to 265g (US9). It's also narrower than virtually any other trail super shoe, especially at the midfoot, making it a shoe built for front-of-pack runners with efficient mechanics. Available since December 2025, it's the one on this list you can start training in right now.
Topo Athletic Terraventure 5
- Wide toe box prevents long-run cramping
- 3mm drop, natural feel without full zero-drop adaptation
- Proven across four generations of trail runners
- GTX waterproof version coming fall
- Low drop still requires some adaptation if coming from a 10mm+ shoe
- Not a racing shoe. It's a high-mileage trainer.
- Less cushion than max-stack options
Topo's Terraventure line has been quietly building a loyal following among ultra runners who prioritize foot health over flash. The wide toe box allows toes to splay naturally, critical on multi-day efforts where swelling is inevitable, and the low 3mm drop encourages a natural foot strike without the full adaptation demand of zero-drop. The v5 adds a dual mesh upper with reinforced high-abrasion zones and an FKT insole with drainage channels for wet conditions. At $140, it's competitive with anything twice the price for high-mileage training.
Kiprun Kipsummit Max
- High-stack cushion at a mid-range price
- Carbon-plated race version available at $250
- Decathlon's engineering pedigree behind it
- Fills a gap: max cushion under $175
- Completely unknown brand to US runners
- No US community reviews yet
- Fit and durability unproven in long-distance use
Kiprun is Decathlon's performance running sub-brand, well established in Europe and now entering the US market for 2026. The Kipsummit Max ($150) is the high-stack trainer in a three-model lineup that also includes an everyday trainer ($130) and a carbon-plated racer ($250). The pricing is aggressive by US standards. For budget-conscious runners willing to be early adopters, the Max is worth evaluating. Just build in extra time to assess fit and durability before committing it to a race.
New-to-market shoes from overseas brands often have excellent engineering but require extra scrutiny on fit and durability. If you try the Kipsummit Max, log at least 50 training miles before a goal race to surface any hotspot or durability issues. Iron Miles Training Notes
Hoka Speedgoat 7
- Entirely rebuilt, not a refresh — new midsole geometry throughout
- Vibram Megagrip outsole retained
- Proven Speedgoat pedigree across six generations
- Wide variety of terrain applications
- Significant rebuild means adaptation from the 6 for existing fans
- Hoka's max cushion feel may not suit technical scrambling
The Speedgoat 7 is a significant rebuild rather than an iterative update. Hoka redesigned the midsole geometry from heel to toe, not just the foam compound, which changes how the shoe loads and returns energy across varied terrain. It retains Vibram Megagrip and the wide Speedgoat platform that made earlier versions a default choice for 100-mile training. If you've run Speedgoats before, expect a different ride feel rather than a familiar one.
Hoka Zinal 3
- New supercritical EVA midsole, more responsive than v2
- More aggressive 5mm lug pattern for better bite
- $15 price drop from the Zinal 2
- Narrower forefoot improves fit for performance-fit runners
- Proprietary outsole replaces Vibram Megagrip — durability unproven
- Narrower fit excludes wider-foot runners who liked the v2
- No long-term wear data on the new outsole compound
The Zinal 3's most notable change is also its most debated: Hoka dropped Vibram Megagrip in favor of a proprietary outsole compound. For competitive trail runners who trust Vibram's durability data, that's a meaningful trade-off. The outsole is paired with a more aggressive 5mm lug pattern and a new supercritical EVA midsole with better energy return than the Zinal 2. The price dropped to $150, which softens the sting. Worth testing, but log enough training miles to evaluate the outsole before committing it to a race.
The switch from Vibram Megagrip to a proprietary outsole is the key question mark on the Zinal 3. If the compound holds up over 400+ miles, this is an upgrade. If it degrades faster, runners will notice. Worth monitoring early reviews closely. Iron Miles Training Notes
NNormal Cadi
- NNormal's supercritical EVA X Pure foam at a lower price point
- Vibram Megagrip 4mm lugs — proven outsole
- Wider fit than the Kjerag or Tomir, accessible to more runners
- 6mm drop suits a broad range of foot mechanics
- Less performance-focused than the Kjerag or Tomir
- 35/29mm stack — more cushion than some minimalists prefer
- Brand still building US distribution
Kilian Jornet built NNormal around performance-first design, which made the brand's earlier models narrow, precise, and inaccessible to many runners. The Cadi changes that deliberately. A wider fit, a more forgiving 35/29mm stack, and a $175 price point bring NNormal's X Pure supercritical EVA foam and Vibram Megagrip outsole to runners who weren't the target demographic for the Kjerag. If you've been curious about the brand but found the fit or price limiting, this is the entry point worth trying.
Where to Find Them
The biggest mistake trail runners make is buying a race shoe for training, or a training shoe for racing. Here's a quick reference on availability:
Hoka Speedgoat 7: Available at Hoka.com and Running Warehouse. Hoka Zinal 3: Available at Hoka.com. NNormal Cadi: Available at NNormal.com. Nike ACG Ultrafly 2: Available at Nike.com and Running Warehouse. On Cloudsoma: Available at On.com. Brooks Cascadia Elite: Available on Amazon and Brooks.com. Adidas Terrex Agravic Speed Ultra 2: Available on Amazon and adidas.com. Topo Terraventure 5: Available on Amazon and at REI. Kiprun Kipsummit Max: Available at Running Warehouse and kiprun.com.
Planning a race this summer? The Iron Miles Race Planner gives you projected arrival times at every aid station, so you know exactly when your crew needs to be there and what to put in your drop bags at mile 60.