Wyoming Territorial Prison State Historic Site is in Laramie, just off I-80 exit 311. Guided tours are typically offered from late May to early September and are included with admission, and self-guided tours are available during open hours. The last admission ticket is sold one hour before closing. Hours are 9 a.m. to 4 p.m. daily from May through September and 10 a.m. to 3 p.m. Thursday-Saturday from October through April. It is open on Memorial Day, Independence Day and Labor Day, and closed on Thanksgiving, Christmas and New Year's Day.