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  • Drug Take Back Day

    City of Lone Tree 9220 Kimmer Dr., Suite 100, Lone Tree, Colorado, United States

    Have old, expired, or unneeded prescription medications laying around? Drop them off at no cost for a safe and secure disposal. From 10 a.m. to 2 p.m., drop off medications at the Lone Tree Police lobby at 9220 Kimmer Dr.

    Free

  • Castle Rock National Prescription Drug Take Back

    Castle Rock Police Department 100 Perry Street, Castle Rock, Colorado, United States

    Looking for a way to dispose of your unused, unwanted or expired medications? The Castle Rock Police Department is participating in the Drug Enforcement Agency’s National Prescription Drug Take Back event on Saturday, April 25. CRPD will have collection sites at the following locations from 10 a.m. to 2 p.m. where you can dispose of...

    Free

  • Denver Concert Band Presents Young Artist Concert

    Lone Tree Arts Center 10075 Commons Street, Lone Tree, Colorado, United States

    Each year the Denver Concert Band awards a scholarship to encourage high school seniors to continue their music performance. The Young Artist award has been a tradition of the band since 1977. The caliber and expertise of these students is nothing short of amazing. The selections they choose to perform with the band are often...

    $7 – $25

  • Boozy Bookfair with Burning Through Pages

    Ecclesia Market 221 Perry St., Castle Rock, Colorado, United States

    It's a Scholastic style bookfair for adults! Join us for drinks and books and a good time!

    $12.50

  • Castle Rock Arbor Day Tree Planting

    Cobblestone Ranch Park 8571 Castle Oaks Dr., Castle Rock, Colorado, United States

    Register today — advance registration is required to participate. Let’s work together to enhance our community’s natural spaces!In Castle Rock, we love our trees! As part of the Town’s commitment to being a Tree City USA, the POST Partners Volunteer Program hosts annual volunteer tree planting opportunities at neighborhood parks and area green belts. Volunteering is a great...

    Free

  • Blood Drive

    Lone Tree Arts Center 10075 Commons Street, Lone Tree, Colorado, United States

    Donate blood, help save lives. Participate in our blood drive, partnered with Vitalant, at the Lone Tree Arts Center from 11 a.m. to 3 p.m. Donors can sign up for a slot at this link with our code: 1353

    Free

  • Scavenge the Rock

    Castle Rock Museum 420 Elbert St., Castle Rock, Colorado, United States

    Scavenge The Rock is back. What better way to learn about Castle Rock’s history than to explore Downtown Castle Rock with a scavenger hunt? Pick up the clue sheets at the Castle Rock Museum between May 1 and May 30. Go around town to complete the tasks on the sheet. Return the sheet to the...

    Free

  • DCL Presents: Alka Joshi

    DCSD Legacy Campus 10035 S. Peoria St., Parker, Colorado, United States

    Spend an evening with New York Times bestselling author Alka Joshi when she joins us to discuss her captivating new novel, Six Days in Bombay. A book signing will follow the author's presentation. Your General Admission ticket includes a seat for the author talk and access to the signing line. Select titles by the author...

    $20

  • Lone Tree Symphony Orchestra Presents American Spirit

    Lone Tree Arts Center 10075 Commons Street, Lone Tree, Colorado, United States

    Join us for American Spirit, a collaboration with the Spirituals Project, directed by Roger M. Holland. The choir will perform The Welcome Table, a moving spirituals mass that reflects America’s rich cultural heritage. The orchestra will also present Aaron Copland’s The Tender Land Suite, Leonard Bernstein’s lively Slava!, and a medley of iconic music by...

    $10 – $32

  • Community Garage Sale

    Join HRCA for our annual Community Garage Sale! Buyers: Check out the virtual map to discover your next stop on your shopping journey. Spend the day garage sale hopping through more than 100 participating households! Sellers: Add your home to the Digital Community Garage Sale map and reach a large audience of shoppers! Please note...

    Free

  • Trolley Tours

    Downtown Castle Rock

    Join us on Sat. May 2, 2026 for our Annual Trolley Tour of Downtown Castle Rock. This year’s tour will highlight the pioneers of Castle Rock and how they started our great Town of Castle Rock. Ride in comfort as our knowledgeable guides share fascinating history, local legends, and hidden gems along the way. Whether...

    Free

  • Spring Up the Creek

    Multiple Locations

    Join CLEAR for this annual area-wide effort to improve and enhance our local creeks by collecting and removing trash and debris along trails across Castle Rock. Volunteers will be provided with gloves and bags. Snacks and water will be available. All ages are welcome, and this is a perfect opportunity to fulfill community service hours...

    Free