I didn't run the actual trail, but I ran some bandit trails.

From the 183 parking area, I first went west along the regional trail. Almost immediately before the bridge which takes you into the open are with the YMCA, vere left (south). From there, there's a great hill climb at the first left- not too long but steep. This takes you to dirt flats, some winding paths through the trees, a service road, and you can loop back around to the regional trail eventually. If you instead go straight at the first intersection, you get to run right b y the lake, great views. It eventually takes you to the Twin Lakes park, though there are more intersecting trails. Not much mileage on these trails, but if you take the right trail, I believe you could end up connecting with the next section of trails.

Getting back to the regional trail, I then went east. Immediately before the first bridge past 183, there's a trail into the woods. This trail also has some climbs. The trail loops back on itself so if you go straight or right, you're good. In the middle of these trails is what looks like an old, abandoned dirt bike area. It's rather small, but it's kinda neat.

After getting back to the regional trail, I definitely needed more mileage. So I went east some more and, immediately (yes, everything is immediately) after the bridge there is a trail to the right (south). This trail is, I believe, dubbed "The Rim". Go straight, straight, straight some more. You'll be running in a creek bed, and eventually it'll turn into a very miniature canyon. Eventually you gotta take a left, and after an uphill, you hit the actual rim. Nice views, very rocky and rooty, lots of shallow dips. This trail eventually will link up to the service road which, go south and you'll hit the regional trail. But keep going east and you'll be on Deception (the very long, strenuous dirtbike trail). That's where you can get your mileage.

After running the regional trail back to my car, I took the "shared path", concrete bike and pedestrian path, to the north. I only ran until I hit the first road, maybe a quarter mile. But it was good to be in some wide open spaces, even if there were a few buildings and 183 traffic nearby.

Anyway, great set of trails to run on back here. I'm sure there're more around, as I keep finding them (but am definitely not discovering anything brand new).

Upon running again a few weeks ago, I thought of some "advice".

About a mile into the trail, you'll see a stuffed snake, or something like that. When you run a little further and you should see it again on your right. If you're like, "This is too much, not what I planned for!" this is a good place to turn around, before you've gone so far that turning around is pointless and you gotta go the next 3 or so miles.

Also, right around mile five, just after you hit the dirt up-down right next to the Brushy Creek regional trail: on your right you'll notice a bridge. This is also a place to get out. You don't have time for the next two or so miles, or you're getting tired, or whatever, just take a hard right towards the bridge, and then you're on the Brushy Creek Regional rail. This is also a good place to enter the trail. I'll often run the easy trail on the south side of the regional trail, and it goes under the bridge, then I hti Deception for the last two miles of harder trail.

Great for any level. many off paths for bikers or hikers but lots of paved area for strollers and casual walkers!

Another fav for trail running! I don’t get a ton of elevation from it but super technical.

Ran again yesterday. As usual, it was awesome.

While the title here says "Mulligan and Deception", I discoverd yesterday that while Mulligan is a part of the Brushy Creek MTB trail system, it's a smaller section just to the east of the Deception trailhead. The map here doesn't even have the path marked for Mulligan, just Deception.

If you want to do Mulligan, park at the sports complex, and when you cross the very first bridge on the way to the Deception trailhead, take a left. There's a smallish, smooth rock in the grass right at the trailhead that has the word Mulligan painted on it. The rock is easy to miss amongst the tall grass, but the trailhead is easy to spot. Anyway, this trail is rather short, but it is still a good trail for biking and trail running. Lots of turns, switchbacks, tight spots, climbs, etc. It's like a mini Deception.

One of my favorites

The closest parking is actually on the cul-de-sac at the end of Dodge Cattle Dr. Make it easier on yourself and park where the trail starts on the map here, at the sports complex. Half a mile's jog and a left into a grassy field get's you to the trail proper (the trail itself is the second actual right into the trees)

I do trail running. The first time I ran on this trail I was surprised. I must admit: this, for me, is the most physically challenging of any trail I've ran here in the greater Austin area (including Georgetown and even a rugged trail system up near Belton). Limited signage; no benches, rest rooms, doggy bag stations, water fountains; various marked and unmarked forks; the switchbacks seem to connect sometimes and the trail might disappear due to leaves and/or rock. This is NOT a trail for strollers and families! The only "easy" part about this trail is that there is a lot of shade.

OK, now for a very quick summary: three sections to the trail. The VERY beginning is mostly flat and dirt, but after the introduction:
1) A mixture of flats with dirt and small rocks, larger rocks with large ups&downs, a few minor climbs, and lost of twists and turns. This part is mostly smaller rocks to the feet, but you do have to climb onto a few rocks, go through a few tight spots.
2) This is the hardest part. The trail turns into almost exclusively stone under the feet. The hills aren't steep, but they're long. Lot's of hair pin turns, some spots are sheer (don't slip), more tight spots and large rock climbs. But mostly, it's all stone to the feet and the uphills that get you.
3) You'll FINALLY notice some wooded areas. Ahh, dirt under the feet. You're mostly outta the hard part, though a few rocky climbs are still to come. Some parts here are very BMX friendly, and very fun to run.

If you do finally make it to the "end", you'll discover there's no single trail back to the Brushy Creek Regional trail. Pick a larger trail, and you're sure to get there. Go down a skinny trail through the woods, and you'll find yourself back on Deception ("Deception" is the actual name of this trail), possibly running the thing again backwards!

For dirt biking, I think this trial is good, though I say this as a person who doesn't bike. But as one who runs, this trail is quiet possibly the best overall workout you'll get, the trail with the most varied terrain.

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