Haldon is worth a look, there is a locals ride on a Wednesday at 6:30pm starting at the Ley arms in Kenn. The ride is all on the cheeky stuff so better than the blue/red.
As for the moor, the below is about 2-3hrs
Park at the house of marbles in Bovey Tracey, ride up green lane to Haytor, follow tramway to Smallacombe rocks, down to river, up and out of valley to hound tor (ride traverse to right of the tor and up road). Follow road around to Bowermans nose, take bw over and then road to Manaton, bp to Water, then bp down into valley. from here take the path along the river and then out to old railway line back into Bovey.
It’s a pretty easy route to follow and includes a fair few good bits.
edit – Dartmoor Legend for ale.