First, I don't think the golf course would have been a normal route, it seems too far from her home.Good point and I did consider that however my question would be 'how long was it before the police were able to get phone data''? Were they searching in areas the family could have suggested? ie a few of her local running routes
I don't know all the details about getting info on past use of a phone, ie prior to when police started their investigation.
But it seems to me, the first thing they'd do would be to look for a phone signal in real time, ie where is the phone now? So, IMO, a ping on a tower that evening would be forwarded directly to police. Similar to, when they place a trace on someone's bankcards, they are alerted when a new withdrawl takes place. That's different, and easier, than requesting historical records of past banking, which requires a special search warrant showing why they absolutely need that data.
JMO