There are many fun outdoor activities you can do with your mom on Mother's Day in Sussex County, NJ. Here are some ideas:

1. Take a scenic hike: Sussex County has many beautiful hiking trails, such as the Appalachian Trail, the Paulinskill Valley Trail, and the Stokes State Forest. You can pack a picnic and enjoy a scenic lunch in the great outdoors.

2. Visit a local farm: Sussex County has many farms where you can pick your own fruit, such as strawberries, blueberries, and peaches. You can also visit a local farm that offers tours and learn more about sustainable farming practices.

3. Go for a bike ride: Sussex County has many scenic bike trails, such as the Sussex Branch Trail and the Columbia Trail. You can rent bikes or bring your own and enjoy a leisurely ride with your mom.

4. Have a picnic in the park: Sussex County has many beautiful parks, such as Kittatinny Valley State Park and High Point State Park. You can pack a picnic and enjoy a day in nature.

5. Take a scenic drive: Sussex County has many beautiful country roads and scenic drives. You can take a leisurely drive with your mom and enjoy the beautiful scenery.

6. Visit a local winery: Sussex County has several wineries that offer tastings and tours. You can spend the day sampling local wines and enjoying the beautiful scenery.

7. Go bird watching: Sussex County has several great spots for bird watching, such as the Wallkill River National Wildlife Refuge and the Sussex Branch Trail. You can bring binoculars and a field guide and spend the day spotting birds with your mom.

These are just a few ideas, but there are many other great outdoor activities you can do with your mom on Mother's Day in Sussex County, NJ!