Saucony Endorphin Speed 4 After 100 Miles: Still a Tempo Trainer to Beat

Introduction

Some shoes are impressive on the first run and fade quickly. The Saucony Endorphin Speed 4 is not one of them. After 100 miles of tempo sessions, easy runs, travel, and even full days of casual wear, it still feels fresh underfoot, and it remains one of the most versatile tempo trainers available. On first impressions it looked like a genuine shoe-of-the-year contender, and time has not diminished that verdict much: only one shoe edged it out in that conversation.

Who This Shoe Is For

The Endorphin Speed 4 is built as a tempo and speed-work shoe that can also handle a share of daily training. That makes it ideal for runners whose workouts mix faster paces with generous recovery segments, long warm-ups, or long cool-downs. It is equally convincing as a travel shoe: soft enough, with a pliable and generous upper, to wear all day on foot without discomfort, yet still lively enough for easy morning runs in an unfamiliar city.

If your week includes both easy mileage and faster sessions and you would rather not own two separate shoes for that, this is exactly the gap the Endorphin Speed 4 fills.

Main Strengths

The core appeal is the balance it strikes. There is a genuinely pleasant easy-run sensation in the shoe, and when you pick up the pace there is still a nice pop and a real sense of speed. That dual character is rare, and it is why the shoe keeps earning recommendations for a wide range of runners and use cases.

Comfort holds up beyond running. The soft, stretchy mesh in the forefoot has contoured nicely to the shape of the foot over 100 miles without feeling restrictive, and the heel collar and tongue remain comfortable throughout. As a workout shoe that doubles as an all-day casual shoe, it is unusually complete.

Durability After 100 Miles

Physically, the shoe is doing very well. The foam shows no permanent compression, and underfoot it does not feel like a 100-mile shoe at all; it still feels close to new in both appearance and feel. The outsole shows light wear in the usual high-wear spots, specifically less wear than expected at the lateral heel and about the expected amount in the forefoot, consistent with a mix of easy and speedy running. Exposed foam areas show minor scuffing but no gashes or gouges.

The upper is equally sound. The soft mesh has held up with no areas of concern about premature failure, and the heel collar and tongue still look fresh. There is some visual staining between the beads of the Pebax foam and a few surface stains from casual use, plus a light smell, but all of that is normal for this type of foam and this level of use. Performance-wise, nothing has degraded.

Things to Consider Before Buying

The main quirk is the tongue. There is an extra-large chunk of material that sticks out on the outer side of the front of the ankle, and it reads as oddly and awkwardly shaped every time you run in the shoe. It has not caused any chafing or irritation, but it is worth knowing about if tongue fit bothers you.

Price is the other consideration. At $170, and still at $170 ten months after release, the shoe feels a touch expensive, especially with no discount in sight. It is a fair price for what it delivers, but the competition is worth a look before committing.

Buying Advice and Alternatives

Within the Saucony lineup, this shoe sits neatly in the middle: the Ride is the durable daily workhorse, the Endorphin Pro 4 is the carbon-plated race-day shoe with a PWRRUN HG insert, the Endorphin Elite is the alternative race option, and the Triumph 22 covers max-cushion recovery days. The Endorphin Speed 4 blends race-shoe characteristics with more durability for frequent workouts, and it is the piece that ties that rotation together.

If you want to shop around, two alternatives stand out. The Puma Deviate Nitro 3, at $160, is the shoe that previously took the tempo-shoe-of-the-year and overall shoe-of-the-year honors: slightly weaker as a daily trainer, but stronger at picking up the pace. The Tier Valkyrie Speedway Works, at $170, uses a very similar recipe of beaded PEBAX foam, a nylon plate, and a stretchy mesh upper, and is the first shoe to look at if you are chasing the feel of an Endorphin Speed 3 specifically. Neither had dropped from full retail price as of early 2025 in the continental US.

Conclusion

After 100 miles, the Saucony Endorphin Speed 4 has lost none of its appeal. It remains comfortable, fast when asked to be, and structurally close to new. The $170 price tag and the quirky tongue are the only real reservations, and neither is enough to outweigh how well-rounded this shoe is. For runners who want one shoe to cover tempo days, easy miles, and everything in between, it is still an easy recommendation.