R B Winter State Park is on route 192 about an hour east of State College. The park and surrounding Bald Eagle State Forest offer quite a few trails open to horseback riding. The park is also easily reached from areas around Lewisburg, such as Selinsgrove, Sunbury, Northumberland, and Milton.
The map below summarizes trails around the park, and allows you to download them to your device.
Waymarked Trails: R B Winter region 
General Info
Forest around R B Winter is pretty classic central Pennsylvania mountain country. Expect rocks and fairly steep grades. Some trails have fairly easy footing of mostly dirt. Many are much rockier and may not be much fun. While the trail network is fairly extensive, there aren’t a lot of parking options for horse trailers outside the core of the park.
Parking
A large parking lot designated for horse trailers is on Sand Mountain Road, just north of the beach. The western lot of four is gravel and has more grass than others. That’s by far your best choice, unless you are trying to access distant trails.
A shale pit next to the motorized campsite on Black Gap Road has space to park one or two trailers. If someone is camped there it may be tight.
Nearby McCall Dam State Park has limited parking and is a popular spot for hiker parking. At slow times you might squeeze in there. Two trailers might be pushing it.
Parking lots right on Rt 192 at the park are not intended for horse trailer parking, as there are no shared-use trails connecting to them.
If you are interested in trails to the west of the park, there is good horse trailer parking on Cabin Road along 192 just east of the village of Livonia. This is an old section of road which is nicely shaded and gets you back off the main highway. It accesses several nearby trails.
For trails farther out you will probably need to scout a spot to pull off along the road, or park at a gate without blocking it. Frustrating that they can’t have a few more parking areas to access the extensive number of trails.
Loop Trails
A few suggested short loops are shown below.
Short Loop
This 3 mile loop from the main parking area involves a very easy walk on Sand Mountain Road and a climb on McCall Dam Road (both partially paved). Neither are likely to have much traffic. Boiling Spring Trail is a moderately steep descent back to the park.
Black Gap Wet Loop
This is a pleasant 4 mile loop from the campsite on Black Gap Road. Where Black Gap Trail approaches Black Gap Road there are several stream crossings with narrow wooden bridges. These are about 3 feet wide. They do now have toe-boards on the sides. They are treated lumber and can be quite slippery. If you have shoes with traction (e.g. borium) or boots with rubber soles you should be ok, just be cautious. Fording the streams can be difficult as the crossings are quite rocky. This is a somewhat challenging area during slippery/wet season.
Black Gap Longer Loop
This 6.6 mile loop from the campsite on Black Gap Road just goes farther west than the loop above. Please be sure to read the notes above about the stream crossings; they can be a little tricky.
For a little more distance simply continue west to Engle Road before returning. That end of Black Gap Trail is quite enjoyable. Well, most of BGT is pretty scenic.
We will try to add more loop trail suggestions in 2025.
Facilities
Restrooms and water fountains are between the main parking areas and the beach. Fountains do have a “pet faucet” for filling buckets.
Near the recreational parking lots on Sand Mountain road there is an RV dump station with a water hydrant. If nobody is using it, you may be able to water or even hose off horses here.
A couple springs are near the beach but not readily accessible to water your horse.
Amenities
The park is remote from food or fuel, so gas up and take a lunch!
Closest offering is Forest Hill General Store, with fuel and fresh sandwiches, located about 8 miles east on route 192.
Towns of Millheim or Mifflinburg are the next closest choices. Both offer several food and fuel choices. Mifflinburg is bigger, with one fast food place, a 24 hour convenience store, and several better food choices.
If you need adult refreshments after a ride, Millheim has Elk Creek Cafe and Brewery; Mifflinburg offers Rusty Rail Brewing.
When in Mifflinburg, check out the Buggy Museum for a fascinating look at the town’s horse-related history!