In Alma 52:27-39 we have a record of: (1) the Lamanite pursuit of Teancum "until they came near the city Bountiful"; (2) the Lamanite flight back toward the city of Mulek; (3) a battle of "exceeding fury" in which "there were many slain on both sides; (4) Lamanite prisoners were "taken and bound" and "they were compelled to march with their brethren forth into the land Bountiful." Because no mention is made of any stopping to camp for the night, one might make the assumption that all this action took place within one day. On the other hand, one can't entirely exclude extended travel time.
If one does assume only one day for all of these events to have taken place, then according to Sorenson, the maximum plausible distance they could have traveled in one day under hot, fatiguing conditions would have been about 20 miles; the account implies that half of that would be the distance from Mulek to the point they reached near the city Bountiful, for they felt concern that they might not return (the same distance) to safety. After some miles backpedaling, they were defeated, then prisoners were marched "into the land Bountiful" (still the same day). It seems that the city of Mulek and the city Bountiful, then, could not be much more than fifteen miles apart by trail, and somewhat less (ten?) on a beeline. (Source Book, p. 272)
According to Joseph Allen's theory, all these actions might not have happened in one day. [Alan C. Miner, Personal Notes] [See the commentary on Alma 52:17]