Shenks Ferry

The Shenks Ferry Wildflower Preserve.

1. Guided wildflower hike at Shenks Ferry Wildflower Preserve

What: Sierra Club-Lancaster Group leads stroll at perhaps East Coast's premier wildflower spot.

When: Saturday, April 29, 10 a.m.

Where: Meet at trailhead on Green Hill Road near Conestoga.

Bouldering, the hottest trend in climbing, gets a local following

2. Introduction to bouldering class in Gov. Dick Park

What: Learn abut this popular and growing sport of freehand rock climbing.

When: Saturday, April 29, 10 a.m.-1 p.m.

Where: Meet at the Environmental Center at 3283 Pinch Road, Mt. Gretna.

pequea valley planetarium

3. International Astronomy Day at North Museum

What: Family-friendly, space-themed activities, including planetarium show.

When: Saturday, April 29, 11 a.m.-4 p.m.

Where: North Museum of Nature & Science, 400 College Ave.

OUTDOORS: Mason-Dixon Trail gets decorated

View from the Mason-Dixon Trail in York County.

4. Hike on Mason-Dixon Trail near Conowingo, Maryland

What: Hike of 5 strenuous miles, includes views of Susquehanna; led by Lancaster Hiking Club.

When: Sunday, April 30, 1:15 p.m.

Where: Meet to carpool at the corner of Race and Buchanan avenues in Buchanan Park in Lancaster.

Gov. Dick park

Governor Dick Park.

5. Walkabout hike in Gov. Dick Park for those over 50

What: Easy-paced 2-4 miles with stops to admire wildflowers along way.

When: Sunday, April 30, 1:30 p.m.

Where: Meet at the Environmental Center at 3283 Pinch Road, Mt. Gretna. Call 717-968-3808 to register.