23 listings in Denver, CO: always-free spots and free admission days. Each one checked against its official source, every catch spelled out.
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Daily, sunrise to sunset
Hudson GardensDenver
Hudson Gardens in Littleton is free to walk every day from sunrise to sunset: themed display gardens along the South Platte River. The welcome center and gift shop are open 9am–4pm. Some special events have their own times; check the garden's calendar.
Verified Oct 27 · hudsongardens.org
No catch
Daily, sunrise to sunset
Dinosaur RidgeDenver
At Dinosaur Ridge near Morrison you can walk the paved 1.1-mile Dinosaur Ridge trail on your own, from sun up to sun down, with interpretive signs at real dinosaur track and fossil sites. Parking is free. Guided bus tours ($21 adults) and the exhibit halls cost extra.
Verified Oct 27 · dinoridge.org
No catch
Park daily, 1 hour before sunrise to 1 hour after sunset; visitor center 8am–4pm (Nov–Feb)
Red Rocks Park & AmphitheatreDenver
Red Rocks Park is open to the public from an hour before sunrise to an hour after sunset every day, with trails and the famous amphitheatre steps to climb when no show is scheduled. The visitor center at the top plaza has a Red Rocks museum on the venue's history, open 8am–4pm November–February. On concert days the amphitheatre usually closes to the public around 2pm.
Verified Oct 27 · redrocksonline.com
No catch
Tuesday and Thursday 10am–2pm, Saturday 9am–3pm
Broomfield Veterans Museum
The Broomfield Veterans Museum is free and open to the public, with nine exhibit rooms, a 3,000-book military history library and hundreds of recorded veteran interviews. Free docent-led or self-guided tours whenever it's open: Tuesday and Thursday 10am–2pm and Saturday 9am–3pm. Groups of six or more should schedule ahead.
Verified Oct 27 · broomfieldveterans.org
No catch
Grounds open daily (Mon–Thu 6:30am–4:30pm, Fri 6:30am–6pm, Sat–Sun 8am–6pm); visitor center Wed–Fri noon–4:30pm, Sat–Sun 9am–4:30pm
Plains Conservation CenterAurora
Plains Conservation Center in Aurora is free to come in, hike the prairie trails, explore the visitor center and see the tipis and homestead village. It's run by Denver Botanic Gardens with the City of Aurora and is an eBird birding hotspot. Guided programs cost extra. Visitor center open Wednesday–Friday noon–4:30pm and weekends 9am–4:30pm.
Verified Oct 27 · botanicgardens.org
No catch
Mon–Fri 11am–7pm, Sat 10am–4pm, Sun noon–4pm
Arvada Center for the Arts and Humanities
The Arvada Center's 10,000 square feet of galleries showing Colorado and western artists are free and open to the public. Reserve a free spot online or check in at the box office. Open Monday–Friday 11am–7pm, Saturday 10am–4pm and Sunday noon–4pm (until 7:30pm on some theatre nights).
Verified Oct 27 · arvadacenter.org
Catch: Free ticket: reserve online or check in at the box office
First Friday of each month, noon–9pm
Museo de las AmericasDenver
Museo de las Americas, the Latin American art museum on Santa Fe Drive, is free every First Friday from noon to 9pm, no tickets needed. Kids 13 and under and veterans are free every day. Regular admission is $8. Check the museum's calendar before you go, since it sometimes closes for private events.
Verified Oct 27 · museo.org
No catch
Sat, Nov 7, 5:00 PM – 10:00 PM
Denver Museum of Nature & Science
The Denver Museum of Nature & Science is free all evening on Saturday, November 7, 2026, from 5 to 10pm, for Denver Arts Week's Night at the Museums. No ticket or reservation is needed for general admission; just walk up. The planetarium, Infinity Theater and temporary exhibitions need a separate ticket.
Verified Oct 27 · dmns.org
Catch: Planetarium, theater and temporary exhibitions not included
Sat, Nov 7, 10:00 AM – 10:00 PM
Denver Art Museum
The Denver Art Museum is free for everyone on Saturday, November 7, 2026, and stays open late until 10pm for Denver Arts Week's Night at the Museums. Free general admission covers the whole campus: the Hamilton Building, Martin Building and The Kirkland. Register online for a free ticket by picking November 7 on the museum's calendar. The ticketed DIVA exhibition isn't included.
Verified Oct 27 · denverartmuseum.org
Catch: Free ticket required: register online · Ticketed DIVA exhibition not included
Sat, Nov 7, 5:00 PM – 10:00 PM
Wings Over the Rockies Air & Space MuseumDenver
Wings Over the Rockies opens after dark and free on Saturday, November 7, 2026, from 5 to 10pm for Denver Arts Week: aircraft including the restored Thunderbird F-16D, STEAM activities and a free shuttle between participating museums. Get a free ticket online. The flight simulator ride costs extra.
Verified Oct 27 · wingsmuseum.org
Catch: Free ticket required: reserve online
Wed, Nov 11 · check hours
Denver Zoo, City Park
Denver Zoo Conservation Alliance's community free day on Wednesday, November 11, 2026 (Veterans Day). Free timed tickets are released online on October 28 and go first come, first served; book up to five per registration. There are no tickets at the gate and no walk-ups, and every guest needs a ticket, including children two and under.
Verified Oct 27 · denverzoo.org
Catch: Free timed ticket required: released online Oct 28, limited · No walk-ups
Wed, Nov 11, 10:00 AM – 5:00 PM
Colorado History Museum (History Colorado Center)Denver
On Veterans Day, Wednesday, November 11, 2026, the Colorado History Museum gives free admission to veterans and their families, up to five people. The museum is open 10am–5pm. Regular adult admission is $20.
Verified Oct 27 · historycolorado.org
Catch: Only for: veterans and their families (up to 5 people)
Sat, Nov 14 · check hours
Denver Zoo, City Park
Denver Zoo Conservation Alliance's community free day on Saturday, November 14, 2026. Free timed tickets are released online on October 31 and go first come, first served; book up to five per registration. There are no tickets at the gate and no walk-ups, and every guest needs a ticket, including children under two.
Verified Oct 27 · denverzoo.org
Catch: Free timed ticket required: released online Oct 31, limited · No walk-ups
Mon, Nov 16, 9:00 AM – 5:00 PM
Denver Museum of Nature & Science
General admission to the Denver Museum of Nature & Science is free on Monday, November 16, 2026. Walk up anytime; no ticket needed for the wildlife halls and permanent exhibitions. The planetarium, Infinity Theater and temporary exhibitions need a separate ticket.
Verified Oct 27 · dmns.org
Catch: Planetarium, theater and temporary exhibitions not included
Fri, Nov 20, 10:00 AM – 4:00 PM
Four Mile Historic ParkDenver
Daytime admission to Four Mile Historic Park is free on Friday, November 20, 2026, 10am–4pm. Explore the 1859 stage stop, Denver's oldest standing structure, its gardens and grounds, and try gold panning. Signature events and Bright Nights aren't included. Reserve a free day ticket online.
Verified Oct 27 · fourmilepark.org
Catch: Free day ticket: reserve online · Bright Nights and signature events not included
Sun, Nov 22 · check hours
Denver Zoo, City Park
The last Denver Zoo community free day of 2026 is Sunday, November 22. Free timed tickets are released online on November 8, first come, first served, up to five per registration. No tickets at the gate and no walk-ups; children under two need a ticket too.
Verified Oct 27 · denverzoo.org
Catch: Free timed ticket required: released online Nov 8, limited · No walk-ups
Fri, Nov 27 · check hours
Denver Botanic Gardens, York Street
Denver Botanic Gardens is free at both York Street and Chatfield Farms on Friday, November 27, 2026, the day after Thanksgiving. Free days sell out, so get free tickets online in advance; there are no onsite tickets once it's sold out. Ticketed events aren't included.
Verified Oct 27 · botanicgardens.org
Catch: Free ticket required: reserve online, sells out · Ticketed events not included
Tue, Dec 8, 10:00 AM – 8:00 PM
Denver Art Museum
Free general admission for everyone at the Denver Art Museum on Tuesday, December 8, 2026, from 10am to 8pm, including the Hamilton Building, Martin Building and The Kirkland. Register for a free ticket on the museum's calendar. The ticketed DIVA exhibition isn't included.
Verified Oct 27 · denverartmuseum.org
Catch: Free ticket required: register online · Ticketed DIVA exhibition not included
Fri, Dec 18, 10:00 AM – 4:00 PM
Four Mile Historic ParkDenver
Four Mile Historic Park's last free day of 2026 is Friday, December 18, 10am–4pm: free daytime admission to the 1859 house museum and 12-acre park. Bright Nights at Four Mile and signature events aren't included. Reserve a free day ticket online.
Verified Oct 27 · fourmilepark.org
Catch: Free day ticket: reserve online · Bright Nights and signature events not included
Any day
Denver Public Library (Museum and Cultural Passes)
Denver Public Library cardholders can reserve free museum and cultural passes to places like Butterfly Pavilion, the Clyfford Still Museum, Colorado History Museum, Forney Museum of Transportation, Four Mile Historic Park, Molly Brown House and Denver Botanic Gardens. Many passes admit a party of up to four (check each pass). Each pass can be reserved once a month (Botanic Gardens twice a year). Reserve online, then print or show the pass; the cardholder may be asked for ID.
Verified Oct 27 · denverlibrary.libcal.com
Catch: Permanent Denver Public Library card required · Reserve ahead; each pass once a month
Any day
Arapahoe LibrariesDenver
Arapahoe Libraries cardholders can reserve free Exploration Passes to metro Denver attractions such as Butterfly Pavilion and Wings Over the Rockies Air & Space Museum. Book up to 30 days ahead, two passes at a time; each pass covers two or more visitors. Help booking: 303-542-7279.
Verified Oct 27 · arapahoelibraries.org
Catch: Arapahoe Libraries card required · Reserve ahead; two passes at a time
Any day
Jefferson County Public Library (Culture Pass)Denver
Jefferson County Public Library cardholders can book two free Culture Passes a month to places like Butterfly Pavilion, Bear Creek Lake Park, Buffalo Bill Museum, the Clyfford Still Museum, Colorado Railroad Museum and Clear Creek Makerspace. One pass per place per month; passes become available at noon and are valid only on the date booked.
Verified Oct 27 · jeffcolibrary.libcal.com
Catch: Jefferson County Public Library card required · Two passes a month; book ahead
First Thursday of each month, 4–7pm
Molly Brown House MuseumDenver
The Titanic survivor's Capitol Hill home is free on the first Thursday of every month from 4 to 7pm for residents of the seven SCFD counties (Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and Jefferson). No reservations; first come, first served. The museum asks for a donation based on your ability, but it isn't required.
Verified Oct 27 · mollybrown.org
Catch: Only for: residents of Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas or Jefferson counties
