If starting at an elevation of 1,000 feet (300 m), one gains 4,250 feet (1,300 m) on the ascent (not 4000 feet, because 250 feet is lost and then has to be "regained"). Why didn’t we divvy that up by 10 miles? Every 100 feet of elevation gain slows you 6.6% of your average one mile pace (2% grade/mile). Grasping the concept of elevation gain and the ratio of climbs to flat terrain will help you both physically and mentally prepare for a day in the mountains. This is the maxim used by climbers. The rule of thumb out there for elevation gain is that 1000 ft gained vertically is roughly equivalent to 1 mile horizontally. The empirical correction I use is 1 mile per 1000 feet of elevation gain. You should come up with 600 feet of elevation gain per mile. Example: A race that climbs 300 feet would slow an 8 … Sounds like "something" to me! The generally agreed upon ratio used to describe a route with a substantial amount of climbing is 100 feet per mile or 1,000 feet for every 10 miles. How to Find Grade of an Elevation. Grade can be found by measuring the horizontal length of an elevation, the run, and the vertical height of the elevation, the rise. If you go above 10,000 feet (3,048 meters), only increase your altitude by 1,000 feet (305 meters) per day and for every 3,000 feet (915 meters) of elevation gained, take a rest day. Our chart will help you find the oxygen levels by elevation for many common altitudes. "Climb High and sleep low." Grade is expressed as rise/run, so if the rise is 25 and the run is 80 the grade is 25/80. Again, this desaturation of oxygen from the blood and brain is what kicks on the adaptive response in the body, and by incrementally introducing the stimulus, users at sea-level can arrive at real altitude with little to no ill-effects. In our example, the hike is 10 miles round trip. The number of miles in a hike goes hand in hand with the amount of elevation gain. Use the below grade percent incline and downgrade calculator to estimate the actual vertical distance change in feet if you know the grade percentage value and the horizontal distance. Additionally, this section of the trail on the overall ascent that goes down 250 feet subsequently goes up on the descent, so it is counted as another gain in elevation. Therefore the hiking effort was 11.6 + 2.3, or 13.9 miles. For a specific example, my most recent hike on the Bay Area Ridge Trail was 11.6 miles with 2250 feet of elevation gain. Calculating grade and steepness change in feet are good for the calculation of inclined planes in mountain areas. I've seen research out there that backs it up with a few caveats, such as sex, body type, load, terrain, etc. In my opinion the primary factor that affects effort is the amount of elevation gain. But through it all it's clustered around that 1000ft gain = 1 mile flat and that's good enough for me. 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