First mile has 300+ feet of elevation gain, the rest is more moderate. It's a good local trail for rides after work, also holds up well to weather/rain.
Martin St trailhead to Fox Hollow TH is about 1 mile with 300+ feet of elevation gain, then up to Dillard Rd TH, head down the road a ways to Baldy, and then Up. The. Hill. Looking up Baldy, the left track is steep death, right track is moderately steep. I recommend going right, then coming down the fun way.