I considered getting a GPS watch but really did not to spend the money.
I then discovered the free GPSLogger app for my BlackBerry. Its works perfectly. Just start logging and it keeps track of how far I have run and my time via GPS. I can even download my route and upload it into MapMyRun.com or Google Earth to see it on a map. I highly recommend it to anyone with a BlackBerry looking for a free and very precise way to track their runs (it would work just as well on a bike too).
Sent from my Verizon Wireless BlackBerry