Very small hill. Apx. 30m. Usually used for practise, but some times U can get high and far. My personal record is 1hour flying and I have got one flight 21km long from this very small hill.
Generally, very it is the best place for practise...
Forecasts are planning aids, not safety clearance. Check current observations, official airspace and NOTAM information, local rules and your own experience before every flight.