Here are some pictures of a trials garden I made last year. It is all big field stones that I found around our farm. The ground around the rocks is covered with woodchips which looks nice and also makes for soft crash landings! Plus when done riding, the woodchips can be raked back over the tracks and nobody driving by can tell it is more than just landscaping. I also planted some shrubs and ornamental grasses to make it look pretty. The first few pictures were before I had everything planted and the woodchips extended out as far as they are now. I also have some bigger rocks in there now that I don't have pictures of yet. There are a bunch more pictures in the links below.
http://www.thornappleaussies.com/kennelhou...ialsoct05_1.htm
http://www.thornappleaussies.com/kennelhou...ialsoct05_2.htm
http://www.thornappleaussies.com/kennelhou...rialsgarden.htm