Welcome from a small market town east of Hull.
What the Y.Wolds lack in high heights they make up for by being up then down, then up again, then down again, oh, some up, aaaand more down. You can probably climb the equivalent of Whernside on an 8 mile walk.
Some good hill walks within half an hour of Hull are South Cave, Brantingham, Welton. Plus the coast path further up near Brid, Flamborough and Scarborough.
Failing that, there's always the stairwells up Great Thornton Street flats