Nike ACG Ultrafly Trail
Colorway: Spruce Fog/Sea Glass/Black Spruce · Style code: HF5668-300 · Release date: July 29, 2026 at 10:00 AM ET · Price: $260 · Availability: Available now
Where to buy: Noirfonce · Tracked at 11 retailers
More colorways: Nike ACG Ultrafly Trail (HF5668-600) · Nike ACG Ultrafly Trail (HF5668-003) · Nike ACG Ultrafly Trail (HF5668-101) · Nike ACG Ultrafly Trail (HF5668-400) · Nike ACG Ultrafly Trail (HF5668-700)
The ACG Ultrafly Trail is Nike's trail racing shoe, an updated version of the original Ultrafly built for speed over long, technical routes. A ZoomX foam midsole, left exposed at the heel to free up more of the foam's bounce, sits over a full-length carbon fiber plate that Nike tuned softer than the first model's for better control on uneven ground. The mesh upper is lightweight, durable, and made to drain water after stream crossings, while a Vibram Megagrip outsole grips wet rock and mud. Nike lists the weight at roughly 287 grams in a men's size 10, with an 8.5 millimeter heel-to-toe drop.
The shoe releases on July 29, 2026 at $260, arriving in a Spruce Fog, Sea Glass, and Black Spruce colorway alongside a wider ACG trail running collection launching the same day. Within Nike's outdoor range it sits at the race-day end of the lineup, aimed at runners who want a plated, high-energy platform away from the road.