About Three Sisters Falls
Three Sisters Falls was probably the second most popular waterfall in San Diego County behind the neighboring Cedar Creek Falls. As you can see from the photos on this page, it was indeed an impressive waterfall and every bit worthy of its popularity. Like its name indicated, there were three distinct sections separated by sloping granite cascades. The lowermost section seemed more like a steep waterslide of about 30ft in height or so. The two-tiered middle section was probably the most impressive as it was roughly 50ft tall give or take. The uppermost section contained a single plunge that was probably on the order of 20-30ft. So I guess when you take all the sections together including the sloping cascades between each waterfall, conceivably the Three Sisters Falls was on the order of 150ft tall or so (admittedly this is just a guess). We were able to see all of these sections along a good chunk of the trail, but the experience was more rewarding when we actually got right up to each of these sections.
Speaking of Three Sisters Falls’ popularity, we do have to warn that it also gave the false impression that this was an easier hiking adventure than it really was. We’re not kidding about the difficulty score you see at the top of this page. In fact, this was one waterfall where you had better know what you’re signing up for, because failure to do so could mean injury or even death. Indeed, during our hike, we had witnessed expensive search and rescue crews, paramedics, and multiple sheriff helicopters flying to aid those who might have bit off more than they can chew (i.e. underestimated the risks in partaking in this excursion).

Before getting into the details, here’s a brief summary of what you need to know. First of all, this trail was about 4 miles round trip, but it’s upside down (meaning you hike down to the waterfall and hike back up to the trailhead). It took us about 4.5 hours for the entire hike as well as some time to relax before heading back out so an early start is highly recommended to avoid hiking in the dark and to maximize your chances of finding parking reasonably close to the trailhead.

Most importantly, there were very steep sections of the trail as well as tricky (and sometimes dangerous) boulder scrambles in which shoes with good grip (as well as physical conditioning and strength to do the scrambles and climbs) made the difference between a nasty slip-and-fall or moving with more confidence. So we were glad we wore our hiking boots as we saw people in tennis shoes and running shoes slip and fall frequently. Finally, we would recommend against bringing children and/or dogs on this trail (we left our daughter at home because of this hike). Even though we saw some people attempt to do it, the kids didn’t seem to be having fun, and some of the dogs looked pretty unsure about where to go in some of the dicier obstacles. In fact, don’t even attempt this hike in wet weather because the steep terrain would be come downright dangerous if muddy and slippery!
Now that you have an idea of what to expect, here’s the detailed trail description.

After the switchback, the trail then descended in the opposite direction towards a smaller gully that I believe belonged to Sheep Camp Creek, which was dry at the time of our visit. Once the trail was side-by-side with the dry creek, it then meandered alongside it through a fairly shady and partially overgrown grove of prickly brush. Even though we showed up in the Winter, I can easily envision this “forresty” section of trail might be overgrown with poison oak. In any case, the cool shade was already a welcome relief, and it was mostly flat until the foliage opened up and gave way to regal views of the Three Sisters Falls when the trail turned to the left at a clearing.

We had no trouble finding our way down some of the steeper sections here, but we definitely took our time and made sure to think about our next steps. We were definitely glad that we were wearing hiking boots here, because this was the section where we saw others in running shoes who were really struggling with the footing. This steep descent would comprise pretty much the remainder of the loss of elevation towards Boulder Creek, which the Three Sisters Falls tumbled on.

Once we finally made it down to Boulder Creek, this was when we had to climb up towards the waterfalls. The falls could not be seen very well from here due to the presence of large boulders and foliage getting in the way. Perhaps this might be one of the main reasons why Boulder Creek got its name. So to complete the experience, we had to keep going.
It looked like it was pretty normal to attempt the boulder scramble upstream to the falls on either side of Boulder Creek. The seemingly more obvious side was on the left side of the creek (looking upstream), but there was a very dicey boulder scramble early on where people were clinging to slippery rock ledges sloping towards dropoffs. Seeing that scramble early on, we didn’t feel very confident in doing that (despite the presence of some white arrows spray-painted on rocks seemingly suggesting we should do that scramble), but we did see some opportunity to get across Boulder Creek where we picked up what seemed to be an easier trail before shortly thereafter we started losing the trail again.
Regardless of which side you choose to scramble up to the waterfalls, I think this extensive boulder scramble was essentially a choose-your-own-adventure. There were sections where we were faced with giant boulder stacks that didn’t seem obvious to get over, but we would find faint trails climbing the hillsides before going around them. Indeed, we really had to think about where we were going and even be willing to backtrack if we had chosen the wrong paths.

So eventually, we’d get to a spot where we were able to cross Boulder Creek once again near the bottom of the lowermost waterfall. That said, it looked like some folks on the right side of the creek were able to climb even higher up the mountain before getting above and across the rock wall drop-offs leading up to the uppermost waterfall. Since we didn’t continue up that specific path from the first waterfall on the right side of Boulder Creek, we can’t say much more about it.
Once we were at the left side of the lowermost waterfall (there was a spray-painted happy face on one of the rocks indicating we had made it), we carefully scrambled on the slippery rock slope to its top where we were then in front of the middle waterfalls, which we thought were the most impressive of the Three Sisters Falls. Even with our hiking boots on, we had to be very careful on this slope because a slip-and-fall here could easily have meant we would’ve plunged off the rock walls flanking the first waterfall.
Nevertheless, it took us nearly 2 hours to get to this point, and for most people, I’d imagine this would be a suitable place to declare victory, enjoy the views of the waterfalls, and the stunning boulder and mountain scenery looking downstream in the other direction. In fact, we were even able to look at the sloping trail and steep gullies we had descended way in the distance (realizing that we would have to climb back up those very sections of trail on the return).

Beyond this climb, we were then faced with a choice of whether to climb up a giant slab to immediately get right up to the base of the third waterfall, or climb up a notch before scooting across another boulder with dropoffs before getting to that third falls (this was the way we wound up going thanks to some hints by someone watching us struggle with this section). By the way, that notch kept going up to another trail even further up the mountain, which eventually would lead to the top of the third waterfall.

And when we had our fill of this spot, we then went back the way we came. Therefore, the dicey boulder scrambles we took on the way up must now be faced on the way back down. At the gully with the rope, there was a long line to use the rope, so we followed a bunch of folks who opted to boulder scramble their way down without needing the rope. Once we got back to the second waterfall (on the left side of the creek facing upstream or right side of the creek facing downstream), we then carefully made our way down the slope besides the first waterfall. And at that point, the boulder scramble back between the waterfalls and the main trail began.

So once again, we had to face the rock wall with the rope tied to a root-exposed tree. There was a queue to use this rope, but we saw some folks just climb the rock wall unassisted without the rope. After this section, we then had to climb hand-over-feet like those we had seen earlier when we were going down this section. This part was pretty relentless as it was totally sun-exposed and it really made our thigh muscles burn (our thighs were sore after we were done with this hike). But again, with our hiking boots, we had pretty reasonable grip on the lousy terrain, and we’d eventually make it back up past the steep scramble some 50 minutes after we had started the return hike.

Once we were back on the conventional trail above the steep gullies, the remainder of the hike was pretty much easy going (relatively speaking) even though it was still all uphill and mostly lacked shade. We’d eventually return to our parked car roughly a 1/4-mile from the trailhead about 4.5 hours after we had gotten started on this adventure (or about an hour and 45 minutes since we started the return hike from the base of the third waterfall). Needless to say, the conclusion of this hike felt like a real accomplishment, and we rewarded ourselves by returning to Julian for a late lunch as well as some of their famous apple pies.
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