You can do it on the 230L. I have a XT-225 that goes everywhere my friends on bigger KTMs go just slower. Last year one of my old, (we're both in our 70s), friends and I took my xt and his 230L to the San Juan Mts. and road all the high passes. The KTMs got to the top quicker but we had a ball.
Side note, the 230L did not have to be rejetted for the elevation.