Ten thousand acres of white quartz dunes with Egin's steep faces — the northern Rockies' answer to Glamis, and Packard's own test ground.
Ten thousand acres of white quartz dunes with Egin's steep faces — the northern Rockies' answer to Glamis, and Packard's own test ground.
A naturally aspirated engine loses roughly 3% of its power for every thousand feet of elevation — thinner air, less oxygen, less burn. Here is what that means at St. Anthony Sand Dunes, machine by machine:
| Machine | Rated | At ~5,000 ft | Tax |
|---|---|---|---|
| Polaris RZR Pro R | 225 hp | ~191 hp | −15% |
| Can-Am Maverick R | 240 hp | ~204 hp | −15% |
| Can-Am Maverick X3 | 200 hp | ~170 hp | −15% |
| Polaris Xpedition | 114 hp | ~97 hp | −15% |
| Yamaha YXZ 1000R | 112 hp | ~95 hp | −15% |
Standard atmospheric derate, naturally aspirated. A supercharged machine holds manifold pressure as the air thins — boost pays the elevation tax for you.
Paddles all day. Cooler air helps density a little; the elevation still takes its cut.
Put the power back →Conditions, fees and access change — always check the official St. Anthony Sand Dunes page before you haul. Elevation approximate; derate figures are standard atmospheric math, not dyno claims.