Ultra Glide 4
S/LAB Ultra 3
| Specification | Ultra Glide 4 | S/LAB Ultra 3 |
|---|---|---|
| Stack Height | 35mm heel / 29mm forefoot | 26mm heel / 20mm forefoot |
| Drop | 6mm | 6mm |
| Weight | 285g | 245g |
| Cushioning | Maximum | Moderate |
| Price | $160 | $200 |
| Best For | 50K-100 mile, soft-moderate terrain | Fast ultras, technical terrain, elite racing |
Quick Answer: Best Salomon for Ultras
Best Overall for Ultras: Ultra Glide 4 - Maximum cushioning that lasts all day, wide comfortable fit, proven in races from 50K to 100 miles.
Best for Fast Ultras: S/LAB Ultra 3 - Lighter, more responsive, preferred by elite ultra runners who prioritize speed over cushion.
Best Budget Option: Sense Ride 5 - Works for ultras up to 50K-100K if you prefer firmer cushioning.
Best for Technical Ultras: Genesis - Responsive foam with better grip for mountain ultras.
What Makes a Good Ultra Shoe?
Ultra distance (50K+) demands specific shoe characteristics:
Essential features:
- Cushioning that doesn't bottom out after 30+ miles
- Comfortable fit that accommodates swelling feet
- Reliable traction on tired legs
- Breathability for long efforts
- Protection on technical terrain
What to avoid:
- Narrow, race-fit construction
- Minimal cushioning (fine for elites, not most runners)
- Shoes you haven't trained in
- Heavy shoes that accumulate fatigue
Top 5 Salomon Shoes for Ultra Distance (Ranked)
1. Ultra Glide 4 - Best Overall
The Ultra Glide 4 was designed specifically for ultra distance running.
Why it dominates ultras:
- 35mm stack provides all-day cushioning
- Energy foam doesn't compress over long distances
- Wide toe box accommodates swollen feet
- 6mm drop promotes efficient stride
- Proven in 100-mile races
Limitations:
- Less responsive than racing shoes
- Not ideal for technical mountain terrain
Best for: 50K to 100+ miles, soft to moderate terrain
Price: $160
2. S/LAB Ultra 3 - Best for Fast Ultras
Salomon's elite ultra racing shoe for those prioritizing speed.
Why elites choose it:
- Lightweight (245g) reduces fatigue
- Responsive midsole for faster running
- Precision fit for efficiency
- Technical terrain capability
- Proven at highest levels of ultra running
Limitations:
- Less cushioning than Ultra Glide
- Narrow fit not for everyone
- Premium price
Best for: Competitive ultra runners, mountain ultras, fast 50K-100K
Price: $200
3. Genesis - Best for Responsive Ultras
Salomon's newest cushioned model brings energy-returning foam to ultras.
Why it works for ultras:
- Energy Surge foam returns energy
- More responsive than Ultra Glide
- Good protection on technical terrain
- Modern fit and feel
- Versatile for training and racing
Limitations:
- Less proven than Ultra Glide
- Firmer than Ultra Glide
- Higher price point
Best for: Runners who want cushioning with responsiveness, 50K-100K
Price: $170
4. Sense Ride 5 - Best Budget Ultra Shoe
Works for ultras up to 100K for runners who prefer less cushion.
Why it works:
- Proven reliability
- Versatile for training
- Lower price point
- Good for firm-cushion preference
- Road-to-trail capability
Limitations:
- Less cushioning than Ultra Glide
- May cause fatigue on 100+ milers
- Better for shorter ultras
Best for: Budget-conscious ultra runners, 50K-100K, those who prefer firmer cushion
Price: $140
5. Pulsar Trail Pro - Best Technical Ultra Racing
For technical mountain ultras where agility matters.
Why it works:
- Lightweight and agile
- Great traction on technical terrain
- Energy-returning foam
- Precision fit for descents
Limitations:
- Narrow fit
- Less cushioning
- Race-specific, not everyday
Best for: Technical mountain ultras, elite runners, rocky terrain
Price: $180
Ultra Shoe Comparison
| Shoe | Cushioning | Weight | Best Distance | Terrain | Price |
|---|---|---|---|---|---|
| Ultra Glide 4 | Maximum | 285g | 50K-100mi | Soft-Moderate | $160 |
| S/LAB Ultra 3 | Moderate | 245g | 50K-100K | Technical | $200 |
| Genesis | High | 289g | 50K-100K | Moderate-Technical | $170 |
| Sense Ride 5 | Medium | 285g | 50K-100K | Mixed | $140 |
| Pulsar Trail Pro | Medium | 255g | 50K-100K | Technical | $180 |
Choosing Based on Your Ultra
Flat to Rolling 100-Milers
Get: Ultra Glide 4
- Maximum cushioning for 20+ hours
- Wide fit for swelling
- Proven at 100 miles
Mountain 100Ks
Get: S/LAB Ultra 3 or Genesis
- Technical terrain capability
- Responsive for climbing/descending
- Protection on rocky trails
First 50K
Get: Ultra Glide 4 or Sense Ride 5
- Forgiving cushioning
- Familiar feel from training
- Proven reliability
Fast 50K (Sub-5 Hours)
Get: S/LAB Ultra 3 or Pulsar Trail Pro
- Lightweight for speed
- Responsive for racing
- Technical capability
Budget Ultra
Get: Sense Ride 5 or Ultra Glide 3 (on sale)
- Proven performance
- Lower cost
- Good training shoes
Ultra Training vs Racing Shoes
Many ultra runners use different shoes for training and racing:
Training shoes:
- More durable (higher mileage)
- Slightly more cushioning
- Less expensive
- Example: Sense Ride 5, Thundercross
Racing shoes:
- Lighter weight
- More responsive
- Less durable
- Example: S/LAB Ultra 3, Ultra Glide 4
One-shoe approach:
- Ultra Glide 4 works for both training and racing
- Most versatile option
- Cost-effective
Frequently Asked Questions
Should I wear the same shoes for training and racing?
Ideally yes—race in shoes you've trained in extensively. The exception is elite runners who might use S/LAB shoes for racing after training in more durable options.
How much cushioning do I need for 100 miles?
Most runners benefit from maximum cushioning (Ultra Glide 4). However, some experienced ultra runners prefer firmer shoes (Sense Ride 5) based on personal preference. Train in both to find your preference.
What about Speedcross for ultras?
Generally not recommended. Speedcross lacks the cushioning stack needed for ultra distance — the aggressive lugs and firmer platform that make it excellent for short muddy races become a liability past 15 miles. Save Speedcross for shorter muddy races.
How do I size shoes for ultra swelling?
Your feet swell 0.5-1 full size during ultras. Options:
- Size up half size from training shoes
- Use shoes with roomy toe boxes (Ultra Glide 4)
- Bring larger shoes for night/late race
Should I carry backup shoes?
For 100-milers, many runners drop backup shoes at aid stations. Having a fresh pair at mile 50-70 can revive tired feet.
How often should I replace ultra shoes?
Ultra shoes last 300-400 miles typically. Don't race on worn shoes—fresh cushioning matters at distance.
The Bottom Line
For most ultra runners, Ultra Glide 4 is the best choice. It provides all-day cushioning, a comfortable wide fit, and proven performance at distances from 50K to 100 miles.
Competitive runners who prioritize speed should consider S/LAB Ultra 3 for its lighter weight and more responsive feel.
Budget-conscious runners can succeed with Sense Ride 5 up to 100K, especially if they prefer firmer cushioning.
Where to Buy
Recommended Retailers
- REI - Best return policy
- Running Warehouse - Good selection
- Salomon.com - Full S/LAB range
Disclosure: We earn commission from qualifying purchases. This helps support our testing at no extra cost to you.
Last Updated: February 26, 2026
Training for your first ultra? Email us at hello@comparesalomon.com for personalized recommendations.
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