I built to little rock garden and trail in my backyard as well.
Looked like you had a little waterfall or steps that you could have used? What was that in the middle of all those bushes??
Either my rocks are to slick or the tires suck and are to stiff.
I run on river rock when i go to Linda Vista near my house. Those things are slicker that owl turdz. looks like you have some of the same slick round/oval rocks mixed in. Looking good with all the bigger rocks mixed in. Nice!
Z