Two of us did my "Bucklet List" ride to CO last year. 13/47 gearing with stock motors. Would not pull Imogene, Schofield, and others, 12-13k, in second. If you don't mind buzzing the motor in first, it's ok. Over Hwy 50, Monarch Pass, cars were trying to run over us. Hence, I bought a DR650 hoping the extra torque helps. For dual sport rides rides at lower altitude that would include lots of single track, I will ride the WR250.
The WR ran good at altitude and got great mileage, but you can only do so much with 250cc. However, when we bought the bikes, we sort of knew this would be the case. My friend is an A enduro rider, and he was pretty bored with the bike and sold his. For me, at my age, it was ok, if only it had more torque. I have ridden mine with a 49 tooth sprocket and it helps make 2nd more usable.