Rocky Mountain National Park charges a fee to enter. Fees are $25 per vehicle/motorcycle. If you are entering on foot, horse, or bike the fee is $15 per person. You can also purchase a park specific annual pass for $70.
After switchbacking up the south-facing wall bordering Horseshoe Park, at about one mile the trail crosses a low divide and enters the drainage of Roaring River, where views of the top of Horseshoe Falls are possible and damage is evident from both the 1982 dam failure flood and the 2013 rainfall generated flood. After passing the Ypsilon Lake trail about a quarter mile farther, this trail largely follows the 1903 wagon road used to make the old dam at Lawn Lake. The trail mainly travels through forest at an even grade with only occasional views of the peaks nearby until reaching a junction with the Black Canyon trail, where the route turns left (northwest) for the final climb to the lake. Vegetation still shows how much higher the old reservoir was; the modern lake is actually somewhat lower than the original natural lake owing to erosion associated with the 1982 dam failure.