It's been a century since bison were returned to Wind Cave National Park via a recovery program for the shaggy animals, and while they're thriving, overall, in the park, motorists are proving to be a great threat to them.

A long-term study of desert tortoises in Joshua Tree National Park indicates that drought and climate change are behind a decline in their population, according to the U.S. Geological Survey.

With storms rolling through with plenty of snow, Lassen Volcanic National Park has been transformed into a winter wonderland ready for visitors interested in snowshoeing or cross-country skiing.

As we near the end of 2013, with 2014 on the very near horizon, it's time to reflect on the past year in the National Park System. As you reflect -- on your visits, on the parks you'd like to visit, on budgetary matters and everything else that goes into running the park system -- what questions do you have for National Park Service Director Jon Jarvis?