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Union Mill and Bull Run Occoquan Trail Loop

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Hemlock Overlook Regional Park

Union Mill and Bull Run Occoquan Trail Loop is a 3.6 mile heavily trafficked loop trail located near Manassas, Virginia that features beautiful wild flowers and is good for all skill levels. The trail offers a number of activity options and is accessible year-round. Dogs are also able to use this trail but must be kept on leash.

Length 3.6 mi Elevation gain 308 ft Route type Loop

Dogs on leash

Kid friendly

Hiking

Nature trips

Walking

Bird watching

Running

Forest

Views

Wild flowers

Wildlife

Muddy

Rocky

Waypoints (0)
Weather
UV Index
Daylight
Reviews (387)
Photos (379)
Recordings (353)
Completed (711)
Kevin Hvizdash
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HikingGreat!

This is a nice hike you can do if short on time. We walked it Sunday August 2nd around 1 pm. It was humid and maybe 91 degrees. There was shade almost the entire hike which made it fairly pleasant. We parked just past the winery, the gate to the Hemlock Park was closed so we just parked by the gate. They had folks who worked for the winery helping to guide you park your car since the winery gets very busy on Saturday and Sunday afternoons. There were several discarded plastic bags of doggy doo on the ground near the entrance of the park. There are a few steep inclines and declines and a rocky path next to the river, but nothing too challenging. Many people were swimming in the Bull Run, fishing, picnicking on the side. The whole loop took us about an hour and 10 minutes. Afterwards we left the car where it was and walked over to the winery.

Toynette Washington
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HikingBugsRocky
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Victoria Stillwell
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HikingBugsRocky
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Scott Heffron
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Hiking

Nice leisurely walk on a Monday.

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J Zeledon
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This park had the perfect blend of rough and easy terrain, sun and shade, and plenty of critters. Plenty of dogs were there but be aware of the occasional snake, though they scurry away when you approach. My 4 year old son had a great time and enjoyed throwing rocks in the river. Taking the trail back uphill is quite the workout!

Rhoss Bueno
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HikingFeeOff trailRockyScramble
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Zach Millimet
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HikingBugs
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Ross Warren
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HikingMuddy
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Shelby Thompson
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Hiking

An easy hike. Lots of shade and not too crowded on a Friday afternoon. Trail is well-marked and east to navigate. A glass of wine at the winery next door makes it well worth the visit.

Nihir Patel
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Hiking

good hike

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Kalyn Styers
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HikingMuddy
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Caroline Mohan
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Hiking

Great little find!

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Lawrence J
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HikingBugs
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Kayla Mac
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HikingRocky

Nice trail! We took the harder option! it was super fun and had a nice time.

Maja Lucie
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Hiking

Beautiful trail. Hiked it with my 5-yo on a cloudy Sunday and it was pretty busy. Limited parking, but the winery offered parking with a $5 (wine) purchase (yea right!).

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Becky Duncan
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HikingFloodedScramble
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McKell Poulton
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Hiking

Fun for families! Much of the trail is along the river. We enjoyed skipping rocks across the water. We saw a blue heron. The bluebells are also very pretty. It is helpful to use the app because there are a few spots where we were unsure where we were meant to go stay on the loop. During the week it is moderately trafficked, on the weekends it is heavy and there isn’t a lot of space for parking.

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Kat Martin
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HikingOff trail

Took a deer trail along the creek to avoid people. Beautiful wildflowers. Crowded

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Sierra Kennedy
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Hiking

beautiful trail! a lot of people, but easy to keep distance. the only downside is the constant gunfire you hear throughout the entire park.

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Marvin Flores
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Hiking

muy buena .

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Jessica Skerritt
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Hiking

This trail is difficult to find and follow. It’s poorly marked

Maura A.
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Hiking

Short and beautiful. Bluebells rugs all around and clear water running down the river. Charming and magical at the same time. Would strongly recommend it to anybody.

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Paul Yun
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Walking

Simple enough trail that has small elevation throughout. Mostly a stroll and very easy. The positive is the nature, I saw a heron in the lake catching fish, and blooming wild flowers. Negatives would be the clear signs of people, and litter.

David Fuller
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WalkingMuddy

A little crowded but decent trail with kids.

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