Though this trail section is short, don't be fooled into thinking that it won't be a workout. The ascent from near the Unnamed Zig-Zag Trail to the A-Frame is incredibly strenuous. The first .25 of the trail is mellow, and you should enjoy use this portion as a warm up. Once you pass the .3 mile mark, the grade increases steeply, and it won't stop until you reach the top.
The path is a combination of dirt road and paved path, so the steep grade will be the only thing that you'll need to focus on.