Although rated as "easy" be prepared for a short but pretty steep section of fire road as the trail leaves Oak Canyon to the southeast towards the Grasslands area.
The trail follows a meandering stream for most of the hike, bordered with riparian flora and shady oaks but once you leave the canyon, the openess of the grasslands area is a stark constrast.
During the summer months and beginning in late spring, the creek can run dry, but when it's flowing (particularly after a period of rain) the sound of splashing water at several wee waterfalls is a surprising delight. Small pools draw wildlife to the area, especially in the morning and at dusk.
It's really a fun hike that can be enjoyed over and over again. When it is cool enough during the day, lunch is especially enjoyable at the larger falls near the top of the canyon. You'll find plenty of room to stretch out a small table cloth on the flat rocks nearby.
When hiking in the summer, you might consider hiking it in reverse from the route described. Start out in the sunny grasslands area, then finish in the relative coolness of the oak shaded canyon.
Also, if you park well away from the historic dam parking lot, you can add a little extra milage to your day. Last note, water fountains and chemical toilets can be found near the dam parking area.