Lewis Lake is located in the southern part of Yellowstone National Park. It is 4 miles southeast of Shoshone Lake. Lewis Lake offers a plethora great water activities. This lake offers canoeing, kayaking, hiking, fishing, and beautiful views. Lewis Lake is the third largest lake in Yellowstone's national park. There is a boating ramp as well as roadside access to the lake. If you come to the lake to fish, the best times to fish at Lewis Lake is mid-June and mid-October. It is important to observe the fishing regulations in this area. Because there has been an increase in the amount of anglers in the park, Yellowstone has had to adopt new rules and regulations. Some of these restrictions include: opening/closing dates, bait usage, areas where you can only catch and release, as well as number limits within the area. Some areas within the lake are closed to the public due to endangered fish species. 

The campground has onsite staff, food lockers, and potable water. It is located close to the edge of the lake. The campsite is open from mid June to early November. Each campsite comes with a table, and a fire ring. Campground amenities include vault toilets and drinking water. Firewood is also available for sale from the camp host. It is important to note that this campsite is on a first come first serve basis.The campground is located on the southeast shore of Lewis Lake. Six miles to the north of the lake is Grant Village, where you can find restaurants, a gas station, gift shops and camper services. 

Kayaking is permitted on this lake, however kayaks are not provided. If you plan to kayak, bring one with you! Motorized boats are also allowed this lake, however rentals are not provided. If you plan to boat on Lewis Lake, please read up on boating regulations.

Due to freezing temperatures, drinking water may not be available in Lewis Lake Campground beginning early to mid-October. Fall campers should plan to bring their own water. If used, lake water must be treated or boiled before consumption.