As lovers of Rocky Mountain National Park eagerly await this week’s expiration of the timed-entry reservation system that was imposed to restrict visitation in response to the coronavirus, officials in the gateway town of Estes Park say the system has helped them make the best of a bad situation. Reservations to enter the park will not be required as of Tuesday, but critics remain concerned that park officials may bring it back in some form later at America’s third-busiest national park, where they have been grappling with a 44% increase in annual visitation since 2012. Dan Denning, an Estes Park native, staged anti-reservation rallies with four of his brothers at a town park on the Fourth of July and Labor Day. “We didn’t want to get to next spring and have the park superintendent say, ‘We’re bringing back the timed-entry reservation system because it worked so well,’ ” Denning said.