Weather dependent, obviously, but it looks set pretty fair for dry trails.
As you’re in Harrogate, the most local, and most weatherproof day would be in Nidderdale. MB rather than CX, couple of nice rocky descents. This link but from Pateley, adding the ‘out’ route from the Gouthwaite res route on the same site.
Definitely have a day in Swaledale, if you can, also pretty weatherproof. Go to Stu at Dales Mountain Bike Centre in Reeth and ask to buy the most suitable route card for conditions. My own recommendation would be Fremington Edge – Great Pinseat – Gunnerside Gill, Gunnerside, then back along the south bank of the river or up behind to Apedale. MTB not CX.
One more if dry. Park at Skipton earlyish, up to Sharphaw, good descent to Flasby, either cheek directly west (walk through farm inc the tarmac), or legit to the north of that, but may be soggy at the bottom. Road to Hetton. Weets Top via Winterburn reservoir, fast descent to Calton, Airton (good tea shop just north), road to Malham, BW from Malham to Cove Road, short tough climb on road and BW to top of Stockdale Lane, nice descent, bit of cheek to get across northwest past Victoria Cave, fine on a weekday, up road, BW down to Stainforth, cross main road and pick up minor roads north then west into Crummackdale, cracking BW at Thorpe up towards Thieves Moss, descend Long Lane then down to Clapham (tea shops). South across A65 to Clapham station, train back to Skipton.