Hi Gary.
I had one along the Railroad Bed Trail (the gated off road south of the the gun range) about 1/4 mile from the gun range. I had several others along Windmill Creek Loop Trail, also where I heard Dickcissel around (39.611966,-104.835224). This is the first time I've had them at at Cherry Creek. Just listen for their short insect like song and keep an eye out for them perched on vegetation.
Ben Sampson,
Centennial, CO