On the afternoon of Saturday, October 17, 2026, the parking lot of the Mr. & Mrs. F. L. Schlagle Library will fill with decorated cars, their trunks thrown open and stocked with candy. From 2 to 4 p.m., trick-or-treaters in costume — and anyone else who shows up — can make the rounds from car to car for a free fall celebration. Costumes are encouraged but not required; the library's own listing puts it plainly: everyone is welcome.
It is a modest-sounding event, a few hours in a parking lot. But the lot it happens in sits on a hill above Wyandotte County Lake, and the building it belongs to is one of the more unusual libraries in the country — a fact that gives the candy-and-costume afternoon a little more behind it than the average trunk-or-treat.
The Schlagle Library is an environmental learning center, and by the Kansas City, Kansas Public Library's own account, it is one of only two public library environmental learning centers in the United States. It opened on June 26, 2001, in Wyandotte County Lake Park, the result of a partnership between the library system, the Kansas City, Kansas school district (USD 500), and the Unified Government of Wyandotte County's Parks and Recreation Department. The building was purpose-built for its setting: it sits on a hill above the lake with a wrap-around porch for taking in the view, and its collection leans hard into nature — Kansas natural history, wildflowers, reptiles, butterflies, and bird lists for Wyandotte County. The reading area is decorated with taxidermied animals and nature-inspired art, and the library keeps live reptiles, amphibians, and an arachnid on display, along with a "touch table" of animal biofacts, scavenger hunts, and a nature trail.
The name on the building belongs to a man who never worked in a library. F. L. Schlagle was superintendent of schools in Kansas City, Kansas, from 1932 to 1962 — three decades at the head of the district — and the school system later named a high school for him as well; F. L. Schlagle High School opened in September 1973 at 59th and Parallel with more than 1,100 students. The library carries both his name and his wife's, "Mr. and Mrs. F. L. Schlagle," a joint honor that the high school does not.
Trunk-or-treats themselves have become a fixture of American autumns over the past couple of decades, a parking-lot alternative to door-to-door trick-or-treating that is easier on small legs, easier on parents, and easier on neighborhoods without many front porches. At Schlagle, the format fits the setting: a free, outdoors, come-as-you-are gathering that turns a library parking lot into a short loop of candy stations. Local neighborhood groups have pointed to the event as a nearby alternative to traditional door-to-door trick-or-treating for families in the area.
It is also one of four large-scale events the library throws each year, alongside Eagle Days in January, a spring cleaning event in April, and the Lawson Roberts Butterfly Festival in September. Trunk or Treat in October rounds out that calendar, the one event of the four aimed squarely at kids in costumes rather than at birds, butterflies, or spring cleaning.
The library also runs family-friendly programming on third Saturdays — trail hikes, nature crafts, classes on Kansas natural history — plus summer camps for ages 5 to 15, spring break programs, monthly homeschool science sessions, and weekly storytimes, so a family that discovers the place through a candy run in October has plenty of reasons to come back. The trail and gardens are surfaced with wood chips, making them passable for wheelchairs and strollers, and the building has accessible parking, an elevator, and an ADA-compliant automated door.
For the October event, the practical details are simple. It runs 2 to 4 p.m. on Saturday, October 17, 2026, in the parking lot at 4051 West Drive, Kansas City, Kansas — inside Wyandotte County Lake Park, on the west side of the lake just north of Leavenworth Road and east of I-435. There is parking in the circle drive directly north of the library, including two handicap spaces. The library notes that programs and events are photographed or videotaped for promotional purposes and that anyone who prefers not to be photographed should let staff know.
Whether you come for the candy, the costumes, or the chance to see a library with a live arachnid and a lake view, the afternoon is free and open to all — a fall celebration in a parking lot that happens to belong to one of the most distinctive library buildings in Kansas.