The second annual free Mr. T’s Fishing Derby will be held this Saturday, May 10. Ages 2-9 are from 9:30 to 10:30 a.m.; and ages 10-15 are from 10:30 a.m. to 12 p.m. Pre-registration is necessary to ensure a spot. Spaces are limited and there is no cost.

Register online at www.newcastlecolorado.org, click on “Departments” then “Recreation.”

For more information, call 984-3352.

Roaring Fork Outdoor Volunteers will tackle high-priority maintenance on the three entryway trails to Carbondale’s popular Red Hill trail system on Saturday, May 10: Three Gulch, Blue Ribbon, and Mushroom Rock. Volunteers will create well-defined trails through the pinion and juniper forest, as well as improve drainage and rebuild eroded trail sections.

RFOV and their project partners, the USDI Bureau of Land Management (BLM) and the Red Hill Council will provide the tools, materials, leadership and some great rewards, including a dinner at the end of the day.

To volunteer or for more information, call RFOV at 927-8241 or e-mail rfov@sopris.net.

Join the BLM, Hi-Country 4-Wheelers, town of Silt and Waste Solutions, to clean up Silt Mesa BLM property from 9 a.m. to 3 p.m. May 10. Bring gloves, sack lunch and water.

If you would like to sponsor or donate equipment time, call Greg at 963-6084.

For more information, call the town of Silt at 876-2353.

Explore the fields, wetlands, and riverfront of Emma Open Space by biking from 5:30 to 7 p.m. May 14. Meet at the Basalt Post Office and bring your bike and helmet for this unique look at wildlife, scenic views, and engaging conversation about wildlife and water issues. Colorado Division of Wildlife and Roaring Fork Conservancy will lead this free family friend bike tour.

Please dress appropriately; the event will happen rain or shine.

Space is limited, and registration is required. Register at www.roaringfork.org/events.

Call 927-1290 for more information.

The Roaring Fork Audubon group is hosting a field trip Saturday, May 10, to census more than 100 species of birds.

Contact Dave Clark at 963-3479 for more information.