The free park and paid water park are separate

Lake Fairfax Park at 1400 Lake Fairfax Drive in Reston does not charge ordinary family admission for the playground, trails, skatepark, pump track, or unreserved day use. Regular parking is also free. General park and picnic areas are open from sunrise to sunset unless a posted facility schedule says otherwise. The Water Mine is a separate seasonal attraction with its own ticket, schedule, capacity, and child rules.

This distinction is the key to an easy visit. A free park morning does not include the lazy river, and a Water Mine day costs admission for almost everyone who enters. Decide which outing you are offering before leaving home.

Playground, trails, and bathrooms

The small fenced playground has slides, platforms, climbers, activity panels, and paved access from nearby parking. The park also has about 12 miles of mountain bike trails shared by walkers, runners, and cyclists. Fairfax County does not publish a blanket stroller rating for that trail network, so the playground route is a safer stroller promise than a long trail loop.

Public restrooms are available in the park. The approved facility plan identifies permanent restrooms in the main facilities area, picnic area, and camping areas, along with portable restrooms near some recreation areas. Campground showers and campground bathrooms are reserved for registered campers.

Water Mine prices and younger child fit

From June 20 through August 2, Water Mine opens weekdays from 11 a.m. to 6 p.m. and weekends from 10 a.m. to 6 p.m. From August 3 through August 23, it opens daily from 11 a.m. to 6 p.m. Weekday county admission is $17.25 for guests over 48 inches and $14.25 for guests under 48 inches. Weekend and holiday county prices are $18.25 and $15.25. Noncounty admission is $20 on weekdays and $22 on weekends and holidays for every guest older than two. Children age two and younger enter free, but every other guest pays even if an adult does not swim.

Tenderfoot Pond and the tot spray area are designed for toddlers and younger children. Guests under 48 inches cannot use the three story waterslides or Box Canyon ropes course. They need a guardian age 16 or older on Big Pete, Little Pete, and the lazy river. Children under ten must be directly supervised by a paying guardian age 16 or older.

Tickets, capacity, and what to pack

Advance Water Mine tickets are released two weeks ahead on Wednesdays. The facility can reach capacity, especially on weekends and holidays. All ticket sales are final. Same day return is possible with the facility wristband and sign out process, but later returns still depend on capacity.

Bring approved swimwear and a swim diaper or snug plastic pants for children who are not toilet trained. Outside food is allowed, but glass, alcohol, grills, open flames, personal floats, and unapproved life jackets are not. Thunder and lightning close the water area for at least 30 minutes after the last occurrence. Read the water play guide before choosing between Water Mine and a free spray park.

Parking and the other free activities

The park has several parking areas and no routine family parking fee. Event parking charges sometimes appear on special event pages, but those are not the normal cost of a park visit. Parking near the inline rink is more limited than the main lots.

The outdoor skatepark and inline rink are open daily from 9 a.m. to 9:30 p.m. when conditions allow. Children under six may use the skatepark only during scheduled activities, and children under ten need an adult. The bicycle pump track is designed for a range of ages and abilities. The inline rink is free when it is not reserved.

Marina, camping, and a full day plan

The marina rents pedal boats and kayaks on Saturdays and Sundays from May 23 through September 27, from 11 a.m. to 6 p.m. The last pedal boat rental is 5 p.m. and the last kayak rental is 4:30 p.m. RV camping is open throughout the year, while tent and group camping run from April through November. Campsites have picnic tables, fire rings with grills, restrooms, and showers, with electrical service at selected sites.

For a simple family plan, use the playground first, eat near the picnic area, and add only one larger activity. Water Mine is enough for the day by itself. A bike outing or marina visit works better as a separate plan. The Reston parent page has nearby alternatives, the mixed age park guide compares Lake Fairfax with Burke Lake, Hanson, and Upton Hill, and the summer outing guide compares water days across Northern Virginia.

The carousel is permanently out of service

The Lake Fairfax carousel is permanently out of service. Older maps and pages may still show it, but Fairfax County says it is no longer operational. Do not build the visit around a carousel ride.

A little park history

Mack and Irene Crippen proposed a dam in 1958 and developed the property as a recreation area. They conveyed 292 acres to the Park Authority in 1966, and Inez Thew Hill added 129 acres in 1972. That history explains why the park feels larger and more varied than a neighborhood playground. It grew as a recreation destination around the lake.