We would recommend proceeding to Specialty, then taking a rest week or two before performing a “rebuild” where you progress through Build > Specialty again. The reason you might be better served by this is that your equivalent distance is only “Olympic,” so there’s not a huge need for a massive aerobic base like the one you would develop by repeating Base > Build again. Also, on the second time around you could look into doing a mountain-bike specific Specialty plan alongside the Olympic Tri plan (for the running workouts). This might prepare you better for your MTB race goals, and you would just need to follow two plans at once to build your own “offroad Tri” plan.
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