What's Your Experience Riding on Gravity Hills or False Flats?

In mountains I often ride with my GPS set to read the elevation. I find it helpful to get a good lay of the land. Last Monday I chance to be riding from Revelstoke, B. C., over the Selkirks to Golden. The Trans-Canada Highway climbs east there to Rogers Pass steadily if irregularly. But I swore in one section I going downhill. Checking my GPS, I saw I was nevertheless climbing. Evidently I was on what's popularly called a "gravity" or "magnetic" hill -- or maybe by bicyclists a "false flat."

What's your experience with such obviously "illusory" stretches of road?



Styles

Wind River Canyon, in Wyoming.

Especially northbound, there are sections where the rock strata along with grade changes and curves in the road give the strong impression to the uninitiated that the river alongside the road is flowing uphill.
https://maps.google.com/?ll=43.504924,-108.167009&spn=0.000031,0.013819&t=h&z=16&layer=c&cbll=43.50498,-108.167058&panoid=DgJXU2ZzE58tL7n88291cw&cbp=12,293.9,,0,-3.21

When we go to the mountains with my truck and our fairly heavy camper I notice this a lot. Sometimes I think I'm going down hill but the truck gears down and the boost gauge goes up and it starts working. Then other times I think I'm going up hill and the truck is freewheeling. This is very pronounced and noticeable with the big load.

Magnetic Hill in Moncton, New Brunswick comes to mind.


http://en.wikipedia.org/wiki/Magnetic_Hill_(Moncton)

Local to me

http://www.roadsideamerica.com/tip/1796

Can't say I've ever noticed it on the MC, but have on the bicycle long time ago.

Near Bedford PA

https://www.youtube.com/watch?v=VgO6QPEt4mo