This hike kicked my butt but it's because I did it completely wrong (sorry, lame Californian who didn't listen to all my Reno local friends).
I went on a Thursday morning around 10am (NOT AN IDEAL TIME TO GO) in August (so hot) - be aware that five sixths of this height is in the sun with no shade. The whole hike takes about 3-4 hours if you're going at a moderate pace and taking a few breaks along the way, and spending maybe 30 mins at the waterfall to enjoy it. It's 3 miles in, 3 miles back out.
The actual trail head is a little tricky to find if you're not familiar - the hike actually begins at the Michael D Thompson trailhead (yelp that location to find the trailhead). If you're using apple maps and you type in the hunter creek waterfall trail, it won't take you to the right location (at least it didn't on my phone, it kept leading us into gated residential areas on a hill).
A kind local biker told us to not turn left or right but to keep driving past the roundabout until we saw the trailhead / parking lot on our right.
The trailhead has bathrooms, parking spaces for maybe 20 cars, good water fountains, and a few benches you can chill at. Something that my friend and I did on accident was that we took the thin trail on the left (instead of the big fat trail leading to the river), and it wasn't until we got 30 mins in on that side of the hill/mountain that we looked across the river and saw people hiking on the ACTUAL trail (no wonder it was so hard and the trail was barely existing and we had to hold on to plants and almost slipped on rocks) - don't make our mistake.
If you do start out on the thin trail on the left when you're facing away from the parking lot, you reach this point where you cross the river on a metal bridge (that's how you know you're going the right direction) - once you cross the river, the rest of the trail is very obvious (basically, if you feel like the trail isn't super clear, you might not be hiking on the right side of the river. - If that happens, backtrack until you find the metal bridge. The actual real trail is very easy to follow even though there's no signage. You'll hear the river most of the way too.
BRING LOTS OF WATER! - I only brought a 1000mL camelback and it wasn't enough, I finished it before I reached the waterfall. Also bring sunscreen, because so much of the hike is straight up in the sun with minimal shade (you only reach the forest maybe when you're 15-20 mins out from the waterfall), your shoulders will get burned. Wear a hat/ sunglasses too, especially if you're doing this in the summer. Bring good shoes, it's possible to do it in Nike frees but there are definitely some parts where the trail is thin and the rocks get slippery - and when you get to the waterfall the rocks are definitely slippery if you try to get close to it - I ended up taking my shoes off.
There's a few rock-slide type setups you'll have to walk across, so watch out if you have weak ankles. Just when you feel like the hike is getting too hard and hot (if you're like me and didn't think through things properly and didn't go until the middle of the day) - just push through like 15 more minutes and you'll reach the shade/ forest area.
We encountered one snake on the trail (I almost didn't see it because it was so camouflaged). Theoretically, this hike is not THAT challenging in its elevation change and incline. HOWEVER - it's difficult if you aren't ready for the elements (if you're from lower elevation and you're visiting Reno from out of town, say like, Sacramento, you'll definitely feel it on this hike. I got a little lightheaded too because on this day there was a lot of smoke from the fires settling in Reno and I wasn't getting enough oxygen). If you come prepared with water though, you should be fine (my friend and I literally chugged water for 4 mins straight when we got back to the trailhead...)
My suggestion is to do this trail as early as you can (or make it a night hike) - the sun is no joke.
The waterfall is small compared to waterfalls in the PNW but it's pretty fun, it's raging at this time of year and we sat on the rocks and dipped our feet in the cold water and it was really great. Before you reach the waterfall you might have to cross some logs to get to the other side, but it's pretty doable. Overall it's a great trail, just come very prepared. A really good go-to for if your friends are visiting Reno! read more