His official visit to Stanford was his first time on their campus.
"It was great to be able to go out to California," he said of Stanford. "I've been there a lot, but I had never been to Palo Alto before so it was different. I really enjoyed the campus and it was a great atmosphere."
With UNLV, Allen, a standout at Las Vegas (Nev.) Bishop Gorman, has been around the school and their fans because of the proximity to the campus.
"It's the hometown school and being able to play in front of all these fans and my teammates and my dad and my mom," Allen said. "Everyone is here so that'd be a big plus."
"Practices when any UNLV coach comes we will have 100 or 150 UNLV fans stacked up on the side bleachers," he added.
Next up is a trip to Oregon.
"I'll be taken Oregon on the 14th, 15th and 16th," Allen told Scout.com.
"Knowing that Jon [Lloyd] is there, it'd be a quick transition for me to play with a point guard that I played with for two years," he said. "The facilities are great there and their coaches are starting to build a great program."
Then Allen, Scout.com's No. 17 power forward, will take a weekend off before heading to North Carolina the last weekend of October.
"I believe it will be on the 27th, 28th and 29th of October," he said.
Allen said he likes how competitive North Carolina is year in and year out.
"Definitely the competitiveness every year," Allen said. "They are one of the top programs in the country every year and are always competing for the title."
"It's a very competitive atmosphere and every year they are up there," he added.
Of Allen's final four, UNC is the only school located on the opposite coast. Will the distance affect his college choice?
"I've always been thinking if I was going to go out east it would have to be to a big school where we could attempt to get a title," Allen said.
With just two visits left and the fall signing period just six weeks away, Allen said he's planning to come up with a decision in November.
"For sure November," he said. "That's where my goals are set at. I'm going to sign then. I might not even make a commit, I might just sign."
Allen, a four-star prospect, is ranked No. 72 overall in the class of 2012.