For U.S. citizens, the duration of stay in Russia depends on the specific visa type, but under the 2012 simplified visa agreement, most are eligible for a 3-year multiple-entry tourist visa. While the visa itself is valid for three years, you generally cannot stay for more than 6 months (180 days) in a single visit. However, even this 180-day rule is generous compared to the standard "90 days out of 180" rule found in the Schengen Area. If you are traveling on a standard single-entry or double-entry tourist visa (rather than the 3-year version), the stay is typically limited to 30 days. It is important to note that you must also "register" your visa with the local authorities if you stay in one location for more than seven business days. Due to current geopolitical tensions in 2026, U.S. travelers are advised to check the latest State Department "Travel Advisories," as visa processing times and entry requirements are subject to sudden change.