Originally Posted by
Greyride
Yesterday i went for a long ride.. ( ok, 21 miles for me is like a century for you). The last part of the ride seemed very flat or even down hill. I Down loaded the information and I found something very weird. The last part was an elevation gain ( about 300 ft over 5 miles). So to my eye I was going down hill but I was really going up hill? Is this an error in the Garmin?
While I agree with 10 Wheels (that it can be hard to determine visually), another possibility is:
I use Strava on my IPhone and keep getting different elevation readings for the same course: For instance, on an 8.5 mile segment (17 miles round trip), Strava reads anywhere from an 850 foot climb to 1250 feet. It really gets wierd through the two tunnels -- I see climbing spikes in both of them -- Stava may think I am going over the hill rather than under it...