8 a.m. — Social Run, a 3.1-mile trail run at Clear Creek Natural Heritage Center, 3310 Collins Road. Free. Visit www.clearcreekdenton.com .
8 a.m. — TWU Pioneer Preview Day, an open house event for prospective freshmen, at Hubbard Hall, 1600 N. Bell Ave. To register, visit www.twu.edu and click on “Pioneer Preview Day” under upcoming events or call 940-898-3014.
9 a.m. — Marketplace Enrollment Event at Health Services of North Texas, 4310 Mesa Drive. Navigators and an application counselor will discuss and answer questions about the Health Insurance Marketplace. Free. Visit www.healthntx.org .
9 a.m. to 2 p.m. — American Red Cross community blood drive in the gymnasium of St. Andrew Presbyterian Church, 300 W. Oak. St. Walk-ins will be welcome. Call 1-800-RED CROSS or visit www.redcrossblood.org to schedule an appointment using sponsor code “standrew.”
9 a.m. to 3 p.m. — Blue Ribbon Bazaar at the Denton Senior Center, 509 N. Bell Ave. Arts and crafts show features about 35 vendors, all senior citizens. Call 940-349-8720.
9 a.m. to 3:30 p.m. — Introductory fly fishing class at the Lewisville Lake Environmental Learning Area, at Jones Street and North Kealy Avenue in Lewisville. Presented by members of the Dallas Fly Fishers club. Bring eye protection (glasses), a hat, sun protection, a lunch and water. All other equipment is provided. There is a $5 facility fee and a $5 admission fee to enter LLELA. To check space availability, call Richard Johnson at 469-877-0695.
9:45 a.m. to 1 p.m. — Bicycle to Recycle Community Bike Ride starting at the Courthouse on the Square. Ride goes to Pratt recycling facility on Mayhill Road, then returns to Square for lunch at East Side Social Club. Visit www.cityofdenton.com .
10 a.m. — Read to Rover at North Branch Library, 3020 N. Locust St. Free. Children ages 6-11 struggling with reading can read one-on-one with a trained therapy dog from Therapy Pals of Golden Triangle. Parents or guardians must register their children in person and sign a permission slip. Call 940-349-8752.
10 a.m. to noon — Free math tutoring for students in kindergarten through 12th grade at Emily Fowler Central Library, 502 Oakland St. Registration is required; forms are available at all library locations. For more information, e-mail email@example.com.
10 a.m. to noon — “Tree Planting and Care” workshop at Clear Creek Natural Heritage Center, 3310 Collins Road. Free. Call 940-349-8152 or visit www.clearcreekdenton.com .
1 to 6 p.m. — International Games Day at North Branch Library, 3020 N. Locust St. Free event includes card and board games, chess, video games and tournaments, Yu-Gi-Oh demonstrations and more. Call 940-349-8752 or visit www.dentonlibrary.com .
1 to 7 p.m. — UNT Media Library’s International Games Day celebration in Room 111C in Chilton Hall, 410 S. Ave. C. Event includes open gaming on PlayStation3, Xbox and Wii, board games, and a screening of Indie Game at 1 p.m. Free. E-mail firstname.lastname@example.org.
3 to 4 p.m. — “What Did Grandpa Do? Historical Occupations,” a program on locating information about your ancestors’ livelihood, at Emily Fowler Central Library, 502 Oakland St. Free. Call 940-349-8752 to register.
3 p.m. to 2 a.m. — Oaktopia music and culture festival, with more than 60 acts at venues and two outdoor stages around the Square. Del the Funky Homosapien, Astronautalis, the Boombachs, Savage and the Big Beat, and Matthew and the Arrogant Sea headline on the main stage at Hickory and Austin streets. Venues include Hailey’s, 122 W. Mulberry St.; J&J’s Pizza, 118 W. Oak St.; Andy’s, 122 N. Locust St.; the Loophole, 119 W. Hickory St.; and East Side Social Club, 117 E. Oak St. Free admission to stages on the lawn of the Courthouse on the Square and at Banter, 219 W. Oak St. Tickets cost $20. Visit www.oaktopiafest.com .
6:30 p.m. — UNT Mariachi Aguilas in Winspear Hall at the Murchison Performing Arts Center, on the north side of I-35E at North Texas Boulevard. Free. Call 940-369-7802 or visit www.thempac.com .
7:30 p.m. — Guyer High School presents Les Miserables at 7501 Teasley Lane. Cost $10. Advance tickets can be purchased at the Guyer front office between 9 a.m. and 4 p.m. Call 940-369-1156 or e-mail email@example.com.
7:30 p.m. — Denton Community Theatre presents Urinetown: The Musical at the Campus Theatre, 214 W. Hickory St. Tickets cost $10 for adults, $18 for seniors 62 and older, and $10 for students and children. Call 940-382-1915 or visit www.dentoncommunitytheatre.com .
Denton Poets’ Assembly meets at 10 a.m. at Emily Fowler Central Library, 502 Oakland Street. Free and open to the public. Visit www.dentonpoetsassembly.weebly.com.
To tell us about your event or meeting, visit DentonRC.com and click on “Let Us Know” for our online forms; e-mail to firstname.lastname@example.org; fax to 940-566-6888; or mail to Page 2 Calendar, Denton Record-Chronicle, 314 E. Hickory St., Denton, TX 76201.