Marshall has already scheduled his first official visit to Notre Dame for the weekend of Oct. 22 when the Fighting Irish host USC. His remaining four official visit destinations have yet to be determined.
"My dad and I have been talking about it, but we haven't scheduled anything," Marshall said.
Alabama, Auburn, Clemson, Florida, Florida State, Georgia, Michigan, North Carolina, Notre Dame, South Carolina, Stanford, and Southern Cal make up Marshall's final schools list.
Marshall says the campuses he eventually officially visits won't be the only schools he'll consider at the end.
"Some schools I've been to a lot that I don't think I'll need to take an official [visit] to," Marshall said.
One of the schools Marshall has visited a lot is UNC, which recently dismissed head coach Butch Davis and promoted Everett Withers as interim in his place.
"I just want to see what happens this year [at UNC]," Marshall said. "I don't know too much about Coach Withers. So I just want to wait and see what he does. I haven't really talked to the coaches yet. But I'm still looking at them."
Marshall most recent visit to UNC occurred in June when he dropped by camp.
"I was mostly hanging out with my trainer, Reggie, he went there," Marshall said. "We talked to some of the people he knew, I talked to Coach Davis for a while, and I talked to some of the players."
The UNC player Marshall spent the most time with was sophomore quarterback Bryn Renner.
"He seemed like a cool dude," Marshall said of Renner.
Although his recruitment is what he gets asked about the most, Marshall's attention has shifted more towards his senior football season. The 2010 season began with Millbrook going 5-0, but ended in the first round of the NCHSAA 4AA playoffs and a 7-5 record.
"We want to improve on last year," Marshall said. "We want to win a conference championship and make a run in the playoffs."
"We want to work on finishing things," Millbrook head coach Clarence Inscore said. "We got off to a really good start last year and then kind of faltered towards the end of the season [and] ended up 2-5 in the last seven games. We need to learn to finish the things that we start and to carry that throughout the season."
Unsurprisingly, Inscore will be leaning on Marshall, his star running back, who has rushed for over 2,700 yards in his career.
"[Marshall] has a big role and not just as a football player, but as a leader," Inscore said. "The kids look up to him. He's one of my hardest workers on the team. He has to lead us on and off the field.
"He's just such a well-rounded athlete that we've got to get the ball in his hands as much as we can in a game. But at the same time, the defense knows that as well – it's not a secret any more who Keith Marshall is… He understands that he has a role within the team and sometimes he's not going to get the carry, he's not going to get the touchdown, he's not going to have to do the big things, he'll have to do the small thing like block in order for us to be successful. But he's good with that, because he's a team player and he wants to win."