I've installed the nashbar rodeo pedals on my bike and I have purchased a pair of specialized mtb shoes.

So far I can't figure out how to clip in. I'm having trouble getting the shoe and cleat to engage the pedal. Anyone have any suggestions? Is it front first and then the rear, or rear first and then the front?

I have loosen the tension as much as I can on the pedals.

Thanks for your help.

Ok, first, make sure have the right cleats installed, and that they are installed in the right direction. After that, practice in your garage a few times. It should be toe then heel, like ski bindings.

If that doesn't help, I have no idea.

They're rodeo pedals, you need to attach the cleats to leather boots.... it also helps if you're wearing leather chaps and a ten gallon hat.

Post a picture of yourself in boots, chaps, and hat trying to clip in so we can analyze the problem more accurately.

You "toe in" The front of the cleat seats into the pedal first, then you press down to spring the catch and capture the rear of the cleat. The pointer part of the cleat needs to be to the front.
You want to try and mount the shoe with out putting your foot in it. Then you can look and see hwat is going on.(You might be able to do this with your foot in the shoe, I am not that flexible) Look to make sure the tread of the shoe is not contacting the pedal anywhere, that can make it really hard to hook in.

When I first started using clipless pedals I remember thinking that I had to push down a lot harder for the back end to engage than I expected I had to. (do the front end first)

I started using SPDs and still use them. It took a couple of hours of practice for me to get it but once I got it, that was pretty much it. Sorry I can't offer and specific advice, just that it takes practice.

One strange thing, I have tried clipping the shoes with my hands while trying to check clearance on some new bags. I just couldn't do it. I guess your feet establish a sort of memory on clipping in.