Festival Del Sol, Chili Bowl, Mapleton Hill PorchFest and other Boulder events for today

Sep. 18—Festival Del Sol: Kick off National Hispanic Heritage Month (Sept. 15-Oct. 15) with traditional dance, live music, food trucks, beer/wine garden, art vendors, and plenty of kids activities at this second annual bilingual festival; noon to 5 p.m. Sunday, Chautauqua Auditorium, 198 Morning Glory Drive, Boulder; free; chautauqua.com.

Mapleton Hill PorchFest: This free neighborhood music festival returns for its 10th year. Cruise through the streets on foot or bike (be careful if you're driving, as, "there may be dancing in the streets.") More than 25 musical acts unload their gear on local front porches and yards and listeners can grab an ice cream, tapas or tacos from local food trucks. Bring chairs or blankets and listen to local tunes; 1-4:30 p.m. Sunday, Mapleton Hill, east-west between 9th and 4th streets and north-south between Concord and Spruce streets; Map and details at mapletonhillporchfest.com.

Chili Bowl Street Party and Pottery Sale: Nab some of the latest works from Boulder Pottery Lab while partying in the street at this festival that features plenty of chili tastings from restaurants, beer and cider, art activities and live music from Paul Kimbiris, Parchment Doll, Backy Arde Band, Christopher Smith & Friends and Holly and the Husbands; noon-5 p.m. Sunday, Studio Arts Boulder, 1010 Aurora Ave., Boulder; Free; studioartsboulder.org/chili-bowl.

Colorado Skies, Fall Equinox: Head to the planetarium to learn about the autumnal equinox and explore late-summer and fall constellations; 1 p.m. Sunday, Fiske Planetarium, 2414 Regent Drive, Boulder; calendar.colorado.edu/event/colorado_skies_the_fall_equinox.

Milestone performs the Beatles: Milestone is composed of some fine Colorado musicians who are known for their authendic musicianship and versatility. This show will feature artful renditions of Beatles songs; 7 p.m. Sunday, Dairy Arts Center, 2590 Walnut St., Boulder; $15; thedairy.org.

Takács Quartet: The Grammy Award-winning group has been serenading Boulder and beyond for three decades and counting. Catch them today on the CU Boulder campus; 4 p.m. Sunday, Grusin Music Hall, 1020 18th St., Boulder; cupresents.org.

Indie folk at BoCo Cider: Hear Denver indie-folk singer Evan James play some acoustic originals and classic covers with an added twang; 4 p.m. Sunday, BoCo Cider, 1501 Lee Hill Drive, Boulder; Free; bococider.com.

Boulder Comedy Show: Laugh like a fool at Boulder's longest-running comedy show. The gig always features the funniest crop of local comedians and often brings in national stars; 7 p.m. Sunday, Rayback Collective, 2775 Valmont Road, Boulder; $20; bouldercomedyshow.com.

Bonnie Lowdermilk Quintet: From modern instrumentals to a beautiful ballads, hear an array of arrangements and original compositions from this quintet; 7 p.m. Sunday, Muse Performance Space, 200 E. South Boulder Road, Lafayette; museperformancespace.com.