September 15th 1821 Costa Rica declared it’s independence from Spain. The 1st constitution was signed shortly after and they held their 1st elections in December 1821. The day is filled with laughter, joy and celebration. There are many parades all around Costa Rica.
This tradition of the torch run is based on the factual accounts of one Dolores Bedoya, a Guatemalan woman who took a torch in hand to celebrate the announcement of freedom from Spanish rule. This was actually communicated on September 14th, 1821, which is why most festivities begin on the 14th. She is also attributed to the National Anthem of Costa Rica being chanted at 6:00 pm on September 14th.
Check out this link for some beautiful pictures: Tico Times article
Here is a short video: