Biking and rollerblading elf Santa Erik Riese has designed a fun alleycat race at Matthews Park. The course takes about 45 to 75 minutes, and you’ll want to have your camera phone ready to complete some of the challenges. There’ll be prizes for the top finishers, plus swag for everybody who participates. For folks who aren’t into the alleycat, Santa Erik will throw on some rollerblades to lead a non-competitive slow roll through Seward and Longfellow. You’ll need to sign up for the alleycat race, but you can just show up for the slow roll. Find tickets at eventbrite.com. Meet at the corner of East 25th Street and 29th Avenue South in Minneapolis.