Printing a poster requires a large format printer, but there are plenty of places you can get them printed, including on the UVU campus. You will typically need to submit your file as either a PDF or a JPEG.
The UVU Speciality Printing department can print high quality and large format academic posters. When you submit your order, be sure to specify whether or not you want your poster mounted on foam board. Note this department is located on the west side of I-15.
If you're traveling to present your poster, consider having your poster printed on fabric so it's easier to pack. Spoonflower is just one online company that offers this service.