There are a variety of conferences, meetings and seminars organized in Canada and in the USA. These can be enriching opportunities to meet peers, share your research, and see what kind of work is being done!
Here are a few events currently open to undergraduates:
CUMC: the Canadian Undergraduate Mathematics Conference is the largest of its kind. An amazing opportunity to meet your peers from across the country!
Bridges Conference is a conference on mathematics and art. This year University of Waterloo is hosting it in July.
Some conferences that have passed for this year, but keep an eye for next year: