Picture a line across Thornton at East 136th Avenue. The biggest new places this year that can fill a whole afternoon all sit on the north side of it. There's a nature-focused public library on 15 acres, an indoor go-kart center near 160th and Grant, and a 90,000-square-foot sporting goods store at Larkridge with a climbing wall.
The city's own fall and holiday calendar mostly stayed put. Trunk or Treat, Día de los Muertos, WinterFest and the arts center performances are all at the older civic venues on Dorothy Boulevard, Carpenter Park and McAllister Park. Most of the new north-end places close by early evening, and most of the city events start around dark. That leaves Thornton this fall with two schedules that fit together better than either one works alone.
The Library That Anchors the North End
The Anythink Nature Library opened on Saturday, Aug. 8, at 6811 E. 136th Ave. Anythink Libraries calls it the nation's first public nature library. The building is 33,000 square feet on a 15-acre campus right next to the 140-acre Aylor Open Lands. That address puts it at the southern edge of the new cluster and makes it the easiest place to start a north-end day.
Inside are an art and science lab, a living plant wall, sensory spaces, and a water flow and mud pit. Outside, the Roots to Sky Loop runs through shortgrass prairie on the property, and the library lists a trailhead connection to the Aylor trail system.
The TryIts collection is what makes this library a weekend tool. At opening, the library had about 550 items across 65 collections, including bird-watching kits, wildlife cameras, hiking gear, microscopes and weather tools, and its long-term goal is more than 1,500 items. Anythink says TryIts are free with a library card. That means a family can check out binoculars on a Saturday morning and use them on the Aylor trails before lunch.
The hours shape everything else in this post. The library is open Monday through Thursday from 9 a.m. to 8 p.m. and Friday and Saturday from 9 a.m. to 5 p.m. It's closed Sunday. Its October calendar has "Roots & Rhythms: Beet Drop" tonight, Oct. 8, from 5 to 7 p.m., and "Wildcraft Poetry" on Saturday, Oct. 10, from 2:30 to 4 p.m.
What Costs Money Farther North
Past the library, the newer venues charge for their main attractions, and each one has rules that are easier to learn before you drive up.
K1 Speed Thornton is at 16059 Grant St. The company announced the opening on May 26 and describes a 50,000-square-foot venue with a multi-level kart track. The arcade has about 20 games for all ages, and the Paddock Lounge serves food and non-alcoholic drinks.
Dick's House of Sport at Larkridge, 16401 Washington St., is the first House of Sport in Colorado. The Denver Post reported in June that the 90,000-square-foot building on about 11 acres is almost twice the size of a typical Dick's store. Planning documents describe it as a community destination built around sports and activity. The store also has a service bar for bike repairs, hockey skate sharpening and baseball glove steaming.
Here's how the two compare on the details that decide whether a trip works:
| K1 Speed Thornton | Dick's House of Sport | |
|---|---|---|
| Main attractions | Multi-level kart track, arcade, Paddock Lounge | Climbing wall, HitTrax batting cages, golf simulator rentals |
| How you pay | Per-person race packages; an annual license is required unless you have a membership or buy a Speedpass | Booked by appointment: a 15-minute climb or 30-day climbing pass, 30- or 60-minute simulator sessions, and 15-, 30- or 60-minute HitTrax cage rentals |
| Beyond the main attraction | An arcade with about 20 games, open to all ages | Listed free events, including a Sunrise Stretch yoga class with Converge Yoga and a "Pack Wars" trading card event |
| Rules to check first | 48-inch minimum for junior karts and 58-inch for adult karts; juniors and adults can't race together; management approval after an on-site safety check | Prices aren't shown on the booking pages |
The opening date for House of Sport is still unclear. The store's own page lists hours of 9 a.m. to 9 p.m. Monday through Saturday and 10 a.m. to 7 p.m. Sunday, and it shows upcoming events. In June, though, Larkridge's site was still saying "late fall." Check the store page the morning you go. K1 Speed's official page didn't show daily hours when we reviewed it, so check before going there too.
Bricks & Minifigs Baseline, a LEGO reseller that sells new and pre-owned sets, minifigures and loose bricks and offers buy, sell and trade services, has a listing at 16691 Washington St. Its store page lists Monday through Saturday hours, but Larkridge's site still says "Opening Winter 2026," so it's best treated as coming soon.
The City's Calendar Starts About When the North End Winds Down
Thornton's own fall events are almost all south of 136th, and nearly all of them happen in the evening. Here's the season in date order:
- Friday, Oct. 16, 7 to 8 p.m. A Día de los Muertos-themed performance by Playground Ensemble at the Thornton Arts & Culture Center, 9209 Dorothy Blvd.
- Saturday, Oct. 17, 6 to 9 p.m. Trunk or Treat at the Carpenter Park Fields parking lots, 11000 Colorado Blvd. Admission is $5 per person or $15 for a family of four.
- Wednesday, Oct. 21, 6 to 8 p.m. Thornton Police Department Haunted Hallways, free, at 9551 Civic Center Drive and 13150 Quebec St.
- Saturday, Oct. 31, 8 a.m. to noon. The city's Fall Leaf Drop-off at 12450 Washington St., where Thornton residents can bring leaves for composting.
- Sunday, Nov. 1, noon to 5 p.m. The free Día de los Muertos celebration at McAllister Park Center, 750 W. 96th Ave., with live entertainment, food trucks and an artisan market.
- Dec. 11 to 13. WinterFest at Carpenter Park Fields, with Santa's Village, skating, a holiday marketplace, entertainment and fireworks. Hours are 6:30 to 9 p.m. Friday, 10 a.m. to 9 p.m. Saturday and 5 to 9 p.m. Sunday.
Put these next to the north-end hours and the two schedules mostly don't collide. On Saturday, Oct. 17, the Nature Library closes at 5 p.m. and Trunk or Treat opens at Carpenter Park an hour later. A family could do the Roots to Sky Loop and borrow TryIts in the afternoon, then head south for the evening. Fridays work the same way: the library closes at 5, and the Playground Ensemble performance starts at 7.
Sundays work the other way around. The Nature Library is closed, and Bricks & Minifigs' store page lists it as closed Sunday too. Meanwhile, two of the season's biggest city events land on Sundays: Día de los Muertos on Nov. 1 and the last night of WinterFest on Dec. 13. On Sundays this season, the south side of Thornton has more going on.
One more city stop is easy to miss because it's weekdays only. The free 70th Anniversary History Exhibit is at the Thornton Arts & Culture Center Annex, 9211 Dorothy Blvd., open weekdays from 10 a.m. to 5 p.m.
Where Dinner Fits
The small new restaurants this year opened mostly near the southern venues, which works well for the evening half of the day. Thornton's new business license list shows Real de Minas Mexican Grill V at 10180 Grant St. with an open date of July 7, 2026, and Waldo's Chicken and Beer at 9675 Washington St. with an open date of July 28, 2026. Wing Shack Thornton, at 10280 Washington St., has a June 13 open date. Farther south, Deja Foods Grill and Tap House, at 451 W. 84th Ave., has an April 3 open date, and the city's July newsletter describes it as a locally owned gastropub. The dates on that list are license dates, so confirm hours with the restaurant.
The North End Isn't Finished
The northern cluster is also where the next outdoor projects are planned. The city has planned an extension of the Big Dry Creek Trail from about 148th Avenue to 156th Avenue, connecting to the existing trail toward Highway 7. A new trailhead at 152nd Parkway and York Street is also in design, with parking, a shaded gathering space, Heritage Trail story nodes and a nature-explore area. The city's project page says construction was anticipated in 2026 but gives no completion or opening date. Until the city announces one, the trails at Aylor Open Lands are the main walking option up north.
Anythink says the Nature Library's TryIts collection will keep growing based on community interest and the seasons. The collection was built for exploring outside the building, so it should be even more useful once the planned trail extension opens nearby.
At Gallucci Homes, we track these openings for clients who already live in Thornton and for clients thinking about moving there. Hours, dates and opening plans change, and the questions about them are easier to sort out in a conversation in your own language. If you'd like to talk through Thornton's north end or your plans for the season, schedule an ASL-friendly consultation with Maria.
