I have worn Saucony Kinvara running shoes for about five years now and they have been my favorites. So when I recently saw the Saucony Peregrine ISO trail running shoes which are a very similar pair of shoes to the Kinvara just for trail running I decided to give them a try. I am glad I did because I absolutely love the Saucony Peregrine ISO train runners. Now that I am nearing 100 miles I think I can do a detailed review of the Saucony Peregine ISO trail running shoes.
Overall Specs The Saucony Peregrine ISO trail runners are a neutral shoe with a mid arch. The heel stack height is 22.5mm with a drop of 4mm to the toe. The basic specs of the Peregrine are almost identical to the Saucony Kinvara that I still wear for paved running. My pair is a size 10 and I think they Saucony Peregrine ISO runs pretty true to size as 10 US is my most common shoe size. I think the toe box is definitely adequate but I don’t have wide feet by any means. I definitely wouldn’t say the Peregrine has the “oversized” foot box that is common on some trail runners. Saucony claims 298g for the Peregrine ISO and my shoes come out to 304g and 298g each without any insoles. I removed my custom ones for the weighing but have no clue where the originals are now.
Sole If there is a single selling point of the Saucony Peregrine ISO trail runners it is the sole. Saucony has names for their technology in each section of the sole with the EVERUN topsole, PWRFOAM midsole, and the PWRTRAC outsole. I can’t exactly explain how you can feel all of these different technologies while running or hiking but I can tell you the Saucony Peregrine ISO has a great feel. They have a nice flex to the shoe and a little bounce to each step while still providing enough cushioning on uneven terrain. There is not a rock plate on these shoes but I have yet to have an issue with that even while hiking some decent mountains in New Mexico. I have used the Saucony Peregrine ISO for just shy of 100 miles so far which has been a mix of trail running, road running, hiking, and casual wear.
The sole has huge 6mm lugs that provide phenomenal traction. I have literally never slipped or lost traction while wearing the Saucony Peregrine ISO. I would not call them a great all around runner as they definitely feel over built for normal surfaces but the moment you get off the asphalt the Peregrine comes completely into its own and I have really enjoyed running in them. So far, the Saucony Peregrine ISO trail runners seem to be standing up pretty well. There is a little wear to some of the outside lugs on each shoe but nothing I consider out of the norm for being 20% through their lifespan.
Upper The upper on the Saucony Peregrine ISO trail runners is exceptionally comfortable. Through 100 miles it has survived several accidental rock scrapes without any damage. The upper is also the weak point for anyone who wants to use the Saucony Peregrine ISO for more of an all around trail hiking shoe. Saucony calls the upper ISOfit dynamic. I would call it almost a sock upper. The tongue on the Saucony Peregrine ISO is attached on the sides so that when you lace them up you end up with a sock like wrap around your foot, it is pretty comfy.
The heel cup is rock solid and I’ve had no movement issues from the heel and therefore 0 blisters while wearing the Peregines even on big days. Around the toe there is a lot of mesh which does allow good air flow and I haven’t had any issues with overly sweaty feet. The mesh does tend to let in a decent amount of sand/dust but that’s a fair trade off. The Saucony Peregrine ISO is not a Gore-Tex shoe although Saucony does still offer a Gore-Tex version of the predecessor Peregrine 8 trail running shoe. Personally I am not a fan of Gore-Tex for running shoes. I always end up with hot sweaty feet wearing Gore-Tex so I might as well have just soaked my feet anyways, plus if they do get wet it takes FOREVER for them to dry. Overall I am actually pretty happy that Saucony chose to forgo the Gore-Tex for the Peregrine ISO.
Where the upper leaves a little to be desired is lateral support. I have worn the Saucony Peregrine ISO trail runners for several loose scramble climbs and they do great on the way up. But on the descent you feel like your foot might roll off the side of the shoe under load. I would really like to see a bit more of a locked down feel to the upper through the mid and front of the foot. I think for most trail runners this won’t be much of an issue but for someone who is looking for a bit more of an all around trail shoe, like the Salomon XA Pro 3D, they would fall short. To be fair I know these shoes are in completely different categories but I love the overall feel of the Saucony Peregrine ISO that I wish it could be my go to shoe for all hikes.
Insole I simply mention the insole because this is one thing that I change out on every pair of shoes I own and the Saucony Peregrine ISO was no exception. I use SuperFeet semi-custom insoles that get fitted to your feet at running stores. This means I can’t comment at all on the insoles in the Saucony Peregrine ISO because I never used them.
Final Thoughts I really can’t say enough good things about the Saucony Peregrine ISO trail runners. I wish I could make them into all around trail shoes but that just isn’t what they are designed for. But for trail running and light, fast hikes they perform perfectly and are extremely comfortable. These shoes are wonderful on every unpaved surface I’ve taken them on. The tread is overkill for paved running but provides a great grip on everything from loose dirt, to snow, to rock. They aren’t horrible on the wallet at $120 and are available online and in stores. The Saucony Peregrine ISO is also available in a women’s model under the same name.
For this review I purchased a pair of Saucony Peregrine ISO trail runners in a men’s size 10 with my own money from my local REI store.