Fieldtrip before morning davening

Q: Is it permissible to begin a fieldtrip (tiyul) at daybreak and daven an hour or two later?
A: No, it is forbidden for a person to involve himself with his own matters before davening. It is therefore forbidden to begin a fieldtrip from the moment one is required to daven, even according to the earliest possible opinion. One should daven and then enjoy the trip.