Nightly News | August 17, 2013
>>> one week after her rescue in the mountains of idaho , 16-year-old hannah anderson turned out for another fund-raiser for her family today in san diego . it was a church car wash , and hannah thanked people for her heche. we have more of our exclusive reporting tonight on the rescue, which came about as a result of a sighting by a group of horseback riders in the idaho wilderness. nbc 's kevin tibbles journeyed back to that area with them.
>> reporter: for years, this group of seasoned riders has saddled up and headed oud o ed out into the gnarly backcountry of idaho .
>> every state claims they have the steepest, roughest mountains, but they haven't been to idaho .
>> reporter: the group agreed to take nbc news two days into the wilderness to show just how far hannah anderson had been taken by her captor. a trip that included nine riders and numerous pack horses hauling everything from food to sleeping gear. grueling even on horseback, let alone for a 16-year-old girl on foot.
>> it's like stepping on marbles, and you slip and you can injure your ankle.
>> reporter: and it was on a dry, hot day just like this one that mike and mary young and christa and mark john came across a man and a teenaged girl, hiking in rough terrain some 20 miles from the nearest paved road .
>> but this is it. everything down in here, primitive. that's a hell of a hike with a big rip sack. yeah. but they came up this and went up that trail there.
>> reporter: something was unsettling about the encounter, something the riders kept asking themselves -- what were they doing way out here? and there was something else.
>> she looked scared. the look i seen on her face was pretty much pure fear. i didn't like what i seen on his face.
>> reporter: the group says they rarely, if ever, run into anyone on their fishing trips into glacier-fed morehead lake, which is why they never forgot this out of place couple and why they called police as soon as they saw the amber alert .
>> oh, my gosh, it was her.
>> reporter: a chance encounter this group and one lucky young woman will likely never of forget. kevin tibbles, nbc news, morehead lake, idaho .