I have seen water siphoned up hill it is not easy to start in that situation but it works. The one I saw like this worked by having the intake of the siphon(which was the lowest elevation) as close to the high point in the system as possible and the discharge(higher than the intake by several feet) had a really long run from the high point so the volume of the water in pipe was dramatically more than the volume of the water on the intake side. To prime the system both ends must have valves and you must have a way to pump water at the high point until the pipes are full. Then close off the inlet at the high point and open both inlet and discharge valves at the same time. The larger volume of water trying to fall the shorter distance in the discharge side will out weigh the small volume trying to fall farther on the intake side and it will flow.

This system was used for flooding feilds for waterfowl hunting and the water source it was sucking from was the river on the other side of a levy.

My pond renovation thread here