Running at Altitude

Translate the physiology to runner-specific outcomes.

For the underlying methodology, read the how-to guide of sleeping at altitude.

Marathon racing is the format where altitude training matters most for runners. Two to four hours of continuous output is decided by efficiency, lactate threshold, and pace decay across the back half. Hbmass and oxygen utilisation are the metrics that translate most directly to marathon finishing time.

Most marathon-focused altitude protocols use 4 to 6 week blocks at 2,200 to 2,500m (7,218 to 8,202ft) for 8 to 11 hours per night, timed so the Hbmass peak lands 2 to 4 weeks before race day. The block stacks on top of normal high-volume marathon training. Workout paces stay at sea-level targets. Long-run absorption improves measurably across the block.

For runners targeting Boston, NYC, London, Berlin, Chicago, or Tokyo qualifying or competitive times, the protocol is straightforward to integrate into existing 16 to 20 week training plans. The altitude block sits inside the build phase, not as a separate intervention.

For more on how camps and home altitude integrate, read about altitude training camps.

Trail and ultra-distance racing is where altitude exposure changes outcomes more directly than any other running format. Many of the world's most competitive ultra events cross significant altitude.

Western States goes through 2,667m (8,750ft) at Robinson Flat. Hardrock crosses 4,267m (14,000ft) multiple times. Leadville runs entirely above 2,800m (9,186ft). UTMB crosses 2,500m+ multiple times across its 170km course. Cocodona, Speedgoat, and Tor des Géants all cross sustained altitude.

Most trail and ultra athletes use 3 to 6 week blocks at 2,500 to 3,000m (8,202 to 9,842ft) for 8 to 11 hours per night, timed 1 to 3 weeks before race day. The set point is higher than marathon protocols because the goal is acclimatisation to race-day altitude, not peak Hbmass alone.

Shorter-distance racing rewards a higher VO₂ max ceiling more than marathon racing rewards efficiency. The protocol shifts accordingly.

Most 5K, 10K, and half-marathon athletes use 3 to 4 week blocks at 2,200 to 2,500m, timed 2 to 4 weeks before A-races, with a higher emphasis on sea-level VO₂ max work during the block to lift the ceiling alongside Hbmass.

Track athletes targeting championship-format racing typically use multiple altitude blocks across the year — one in the off-season base, one before championship trials, and one before the championship itself.

Altitude training treadmill running is the most efficient implementation of the protocol for runners who already train indoors.

The Training Cloud accommodates a standard home treadmill within its 2.6m × 1.3m × 2.3m footprint. Run intervals, tempos, threshold work, or steady aerobic sessions at simulated altitude. Absolute pace will be 8 to 15% slower than sea level for the same RPE — adjust workout targets accordingly. Most coaches recommend training indoor altitude sessions to heart rate or RPE rather than pace.

Indoor altitude work pairs cleanly with overnight altitude exposure. Sleep at altitude, do most of your outdoor running at sea level, and use the Training Cloud for one or two structured indoor sessions per week to add hypoxic training stimulus.

Most running seasons use altitude in three places.

Three Box Altitude systems serve three different running use cases.

Box Altitude supplies altitude rooms and full facility installations for running clubs, university distance programs, high-performance training centres, and squad-based marathon and trail programs. F10 and F20 generators are scaled and configured to room volume. Multiple rooms can be controlled independently, each held at a different altitude, and managed through the Box Altitude App.

For squad and facility enquiries, see commercial installations.