Rode in on a motorcycle late at night expecting to not be able to get in, but you can take a parking pass and drop an envelope with your fee at the entrance booth. $15 for a full day $8 after 1PM. The parking fills up fast for Mt. Marcy hikes. Would recommend sleeping at the Mt. Marcy dam lean-to’s (~2 mile hike in) the night before your hike to beat the crowds. **Road going in is very rough use extreme caution on a motorcycle with street tires