The USA midfielder is training with the Trotters after a recommendation to Wanderers boss Owen Coyle by national team manager Jurgen Klinsmann.
The 28-year-old is due to spend three weeks with the club after enjoying an impressive campaign with Colorado Rapids in the MLS in which he appeared 41 times, scoring eight goals in the process.
He told the Rapids official website: "Jurgen asked me if I'd be interested in playing overseas for a few weeks to gain experience and continue competing at a high level following the end of the season. I decided I wanted to do it and ended up at Bolton for a few weeks.
"The opportunity is one that I couldn't pass up. To be considered first of all is great, but to be given such an opportunity at a Premiership club is one that doesn't come around often. Since I've been here it's been everything I had imagined - fast paced, high intensity, fun, while everyone at Bolton have made me feel very welcome.
"The more I am able to play with players of this calibre the more I learn and improve."
It's not the first time Larentowicz has trained in Europe as he spent six weeks with Malmo FF in Sweden in 2004 before travelling to England a year later to try out for a fortnight with Ipswich Town.