Split Rock Loop/Four Birds Trail Short Loop


This loop hike winds through rugged terrain south of the Split Rock Reservoir, passing several viewpoints and crossing the cascading Split Rock Brook.

2.5 hours
3.7 miles
Route Type:
Allowed on leash
Views, Waterfall
First Published:
Daniel Chazin


View Split Rock Reservoir in a larger map

Trail Conference volunteers maintain trails in this park.
Trailhead GPS Coordinates
Driving Directions

Take I-80 West to Exit 37 (Hibernia/Rockaway). At the bottom of the ramp, turn left onto Green Pond Road (County 513). Follow Green Pond Road north for 6.4 miles and turn right onto Upper Hibernia Road (opposite the Marcella Community Center). In 1.0 mile, turn left onto Split Rock Road and follow it for 1.2 miles to a large dirt parking area on the left side of the road, just after crossing the dam of the Split Rock Reservoir. Parking is not permitted along Split Rock Road; tickets may be issued


From the parking area, proceed ahead (east) along Split Rock Road for 0.3 mile. When you reach the second power line crossing, look for a blue-blazed trail to the right, towards the far end of the clearing. This is the Split Rock Loop Trail, which you will follow for the first part of the hike. Turn right and follow the trail uphill, under the power lines. Before reaching the crest of the hill, the trail bears right and enters the woods. After a short, gentle climb, the trail descends into a hollow, then bears right and climbs another rocky ridge.

Soon, you’ll notice a huge glacial erratic to the left of the trail. This boulder, aptly named “The Rock,” marks the highest point on the hike (elevation 980 feet). Just beyond, there is a west-facing view over the valley of the Split Rock Brook.

The trail now bears right and descends on a winding footpath, with some views through the trees. Near the base of the descent, you’ll reach another west-facing viewpoint from a rock ledge. The trail now heads south over undulating terrain.

About a mile from the start, you’ll reach Cedar Point, marked by a single cedar tree. To the southwest, a cable television tower is visible. Just south of this tower is the site of a Hawk Watch viewing platform (worth a visit on another occasion).

The trail turns right, soon reaching a rock outcrop, where it turns sharply left and begins a short, steep descent. It then bears left and descends more gradually through a mountain laurel thicket. Just beyond, the trail goes over a moss-covered mound of rocks. This mound is a remnant of mining activity in the area. When you reach this point, turn left, leaving the trail, and head uphill for about 100 feet to an old mine opening. Note the drill marks in the rock walls around the mine shaft. Use caution, and do not step into the leaf-covered mine shaft!

After viewing this interesting feature, return to the trail, which makes a sharp right turn and heads more steeply downhill. You’ll notice old stone foundations – remnants of former mining structures – on both sides of the trail. Just beyond, the trail crosses a wide woods road and reaches the cascading Split Rock Brook.

The wide brook is crossed on boulders, some of which are covered with moss and can be slippery. The crossing can be a little tricky – especially if the water is high – and care should be exercised. A walking stick may be helpful. If you have difficulty crossing the brook at the trail crossing, you might want to head upstream to find an easier route across the brook.

On the west side of the brook, the trail climbs rather steeply, then bears right and continues to climb more gradually. Soon, you’ll cross an old woods road and reach The Maze, where the trail has been cleverly routed through several narrow passages between large rocks. After crossing another boulder field, with several small seasonal streams, you’ll notice a high ridge looming ahead. The trail bears right to skirt the base of the ridge, then turns left and climbs the spine of the ridge.

At the top of the ridge, you can see the Split Rock Reservoir directly ahead. To the right, a mountain is visible across the valley. You were there about an hour and a half ago! “The Rock” is situated at the top of this mountain, and you’ve hiked a U-shaped route to reach the spot where you are now.

The Split Rock Loop Trail now bears left, making another U-turn, and climbs to a rock outcrop at the crest of the ridge. It then comes out on an open rock ledge and heads west through the woods to end at the white-blazed Four Birds Trail.

Turn right and follow the Four Birds Trail as it descends, passing a huge glacial erratic to the right. At the base of the descent, the trail crosses an old woods road and a stream. Ahead, there is a steep rise, but the trail has been skillfully designed to bear right and loop around the base of the rise, with a very gradual ascent. Upon reaching the crest of the rise, the trail bears left, but soon turns right, crosses under power lines, then turns left again to parallel the power lines. After turning right, away from the power lines, the trail descends to cross Split Rock Road.

Turn right, leaving the trail, follow Split Rock Road downhill to the reservoir dam, and walk across the concrete dam. As you cross the dam, you will see, below to the right, the 32-foot-high charcoal-fired Split Rock Furnace, built of stone in 1862 to smelt magnetite ore into the iron needed for the Civil War. The furnace operated for only about ten years, and was abandoned in the 1870s. The parking area where the hike began is on the left side of the road, just beyond the dam.

Comment: Please be relevant, civil, non-commercial.

It appears the trail got re-routed

11/24/15 - Following the Blue Trail down from Cedar Point and past the abandoned mine opening, rather than crossing the woods road, the trail turns right and follows the woods road about 1 or 2 tenths of a mile.  It then turns left and crosses the Split Rock Brook on a wooden bridge.  Then the Blue Trail turns left and backtracks on the other side of the stream before heading uphill and rejoining the trail as described above.

Split Rock Road and Dam are open for traffic.

The repairs are complete and the road over the dam is now open.  They have added a traffic light at each end of the dam, makes it a lot easier to cross now.  

Split Rock Reservoir Parking

I would like to reiterate the warning expressed by other posters...


It has been brought to our attention by our volunteers that parking tickets are being distributed regularly to folks who are not parking in designated lots.  Before you head out on the trail we ask that you take a look at a Trail Conference map to see where parking is allowed.  I have heard of people being ticketed upwards of $250 for parking illegally.

Split Rock Reservoir Parking

To emphasize Jon's message, there is absolutely NO Parking along the entire Split Rock Rd. There are signs indicating this.  The only parking is in the Fishing Access lot.  

To access Four Birds from other locations, there is parking at Upper Hibernia off Green Pond Rd, also at the Hawk Watch parking area, on Timberbrook Rd outside of Camp Winnebago (do not park in the camp) and a couple of pull-ofs on Green Pond Rd east of Cragmeur. and parking on Bigelow Rd /Green Pond Rd at the ballfield for the northern trail head.

With good weather coming, the PD will be more zealous in patrolling and ticketing. 

I question the designation as "moderate"

First of all, I would like to extend thanks to the initial reviewer. The description of the trail and its landmarks (especially the pointer to the old hematite mine) is excellent. We had no trouble finding the landmarks and following the (recently) painted trail blaze marks.

I would not characterize this hike as "moderate," however. I would classify it as "difficult" or "very difficult." The reason for this assessment is that this trail involves walking on and through endless numbers of boulders, ranging in size from the size of your shoe to the size of your car. Our family was constantly negotiating, stepping on, or hopping from rock to rock to rock.

Add to this the fact that this trail goes up, down, then up, then down, then up, then down, and up and down over and over again, all the while doing it while stepping from rock to rock. See, the heart of this trail is to get from one ridge to another by walking through the boulder-strewn valley and stream between them. They are significant climbs, both up and down.

The reviewer mentions some stream crossings that may have high water. I would add that if it's been raining lately, these stream crossings might well be impossible to navigate safely. On a hot July day, they were easily passable. I would not want to be there after a heavy rain.

In summary, I would say that this trail is more of an "obstacle course" than a "hiking trail." It's a beautiful obstacle course, with great views and beautiful natural scenes. But, an obstacle course nonetheless. Be prepared for this obstacle course with plenty of water, food rations, and most importantly excellent boots. Try it, just try it knowing what you're getting into.

ADDITIONAL WARNING ABOUT PARKING: It would seem that the town of Rockaway is mostly funded by issuing parking tickets along the Split Rock Road. We saw dozens of cars with parking tickets awaiting their owners. The small parking lot just past the one-lane dam road fills quickly. Get there early, and if you can't park in that lot, DO NOT PARK ON THE ROAD. It'll cost you $115.

This hike would be better in

This hike would be better in the Spring or Fall when there aren't leaves on the trees blocking all the views.