Welcome to Calderdale!
Just have a search on here for suggested routes in Calderdale – countless ideas for rides around the area. Search for the Mary Townley Loop and Rooley Moor as well, as Houns suggested.
Nice small loop from Hollingworth lake over to Piethorn Reservoir, but heading North from Hollingworth toward Tod/Hebden the possibilities are endless.
Have a look on the OS map, anything legal is pretty good fun. The other stuff even more so, TBH……
If you have the opportunity, pop into Blazing Saddles bike shop in Hebden Bridge: They have loads of pre-printed route guides, all of the ones I’ve tried have been great. Very friendly and full of useful advice.
You could always have a go at Lee Quarry whilst you’re in the area.