Which tyres for both on and off road use??

I am going to be doing the coast to coast later this year on my mountain bike, i have heard it is a mixture of road and off road (cycle paths and old train lines). Can anybody suggest a good tyre that gives benefits on both? I have seen the specialized crossroads armadillo, is this what I should be looking for? Any experience?
Cheers in advance
Cheers in advance
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I've got Fastrak Pros (Specalized) on three of four of our MTBs and rate them for both road and trail.
http://www.cornwallmtb.kk5.org
gives a narrow, almost racing bike width contact when on the road or hard smooth trail
on soft ground it'll sink in a little and grip with the rest of the tyre
that will be all
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