Mongolian Embassy website says:
“US citizens can travel to Mongolia without visa if his/her duration of stay is less than 90”
But I don’t find anything like the Schengen “within 180 days.” Is there any such time one must stay away? If I am approaching day ninety and there’s still “so much more to see and do,” is it legal to leave and come back the next day? (Technically not a “visa run” if arriving without a visa, but what else can I call it?)
Text on their website shows limitations in English proficiency, so I hesitate to ask them and risk being suspected of wanting to abuse the system. They already told me that to stay longer than ninety days, one must get a visa before arrival (when I asked if one could do it in-country). So maybe “out and in” is an abuse, even if legal.