I remember reading about the Cactus Cup back when I was like, 14 years old, I guess. It was held at McDowell Mtn. which is about 45 minutes away from our home in Arizona. Ashleigh and I made it out there last Saturday and got a good morning of riding in. It's been 15 degrees cooler this week than last so we'll probably start riding mountain bikes a lot more, since we won't have to get up as early to avoid the heat.
There is a pretty nice pump track and some jumps at the parking lot. The pump track was a lot of fun. It's like BMX but smaller and without the pedaling. Definitely would be nice to have the BMX bike too.