GPS FOR BIKING

Please recommend the best GPS device for biking the Greenway. I need accurate information from an app or a GPS. Some trails go through neighborhoods and back on the trail. I would like to explore more, although I'm afraid of getting lost. Thanks

I'm really interested in the Crabtree Creek Trail, Walnut Creek, Rocky Trial 30.8 mile Loop.

I'm really leaning towards something that would give me turn by turn directions. I don't mind spending the money as long as its accurate.

Thanks