A professional botanist and horticulturist will host an Arbor Day tree walk 6:30 to 7:30 p.m. Thursday, April 25, at North Mountain Park, 620 N. Mountain Ave.

A professional botanist and horticulturist will host an Arbor Day tree walk 6:30 to 7:30 p.m. Thursday, April 25, at North Mountain Park, 620 N. Mountain Ave.

Botanist Rachel Werling and horticulturist Anne Thayer will lead the event. The cost is $5. The walk is open to all ages, but children under 10 must be accompanied by an adult.

To register, visit www.ashland.or.us/register online, or call 541-488-6606.