Forsythe Canyon TH to Waterfall & Gross Reservoir & Twin Sisters Peak

No…this trail does not go to Twin Sisters Peak in RMNP. It goes to a different Twin Sisters Peak west of Boulder. But views still look amazing. We went there last year in Spring on a foggy day so we had NO views. Hoping we can see the views this time. On the way, we will pass a beautiful waterfall! Be prepared to scramble rocks around the waterfall and again on the rocks at Twin Sisters.

Difficulty: about 7 to 8 miles with about 1600 feet elevation gain.

HIKE DESCRIPTION: This pleasant tree-lined trail takes us to a beautiful waterfall and ends at the reservoir. Forsythe Creek tumbles over rocks, creating mini waterfalls and lovely sounds of rushing water. Although a vast majority of this trail is easy, the last bit near the waterfall is more moderate as you scramble rocks. From the reservoir, we will hike up to Twin Sisters Peak where we will have 360 views. A portion of the trail is through a less-traveled area so long pants are recommended. A portion is also along a county road, but we will avoid the road as much as possible. This exact trail is not in alltrails, so here is a link to my self-made route in alltrails: https://www.alltrails.com/explore/map/map-may-20-2025-1eb590c?u=i&sh=ittjkn

DOGS ALLOWED IF FOLLOW PARK RULES: Allowed on a leash. Please be sure your dog is well behaved and can handle length of the walk. Dog owners must clean up pet excrement.

ADDRESS/DIRECTIONS: We will meet at the Forsythe Canyon trailhead. To get there, you can click on the following alltrails link and click directions: https://www.alltrails.com/trail/us/colorado/forsythe-canyon-to-waterfall-and-gross-reservoir. Or if you use Google maps or Apple Maps, you can type in “Forsythe Canyon Trailhead” for directions.
We wait 5 minutes for late arrivals…but no longer as that is inconsiderate to those arriving timely. So please allow extra time to get to the trailhead.

IMPORTANT: This is a participate at your own risk event! Life is risky. I am not a professional guide and am simply hosting this event. By signing up for this hike you acknowledge that you are capable of performing this hike and that you are solely responsible for your own safety.

NO SHOWS: If you are a no-show to 2 hikes, you will be booted from this meetup group. So please change your RSVP to “not going” if you are unable to make it.

WHAT YOU SHOULD BRING: Water, snacks, layers of clothing, good hiking shoes/boots, sunscreen, sunglasses, hat, gloves, hiking poles (if you find them helpful), and anything else you deem essential.

WEATHER: Here is the NOAA forecast for the hike location. For hourly temps, wind, precipitation, etc., click “Hourly Weather Forecast” in the upper right. https://forecast.weather.gov/MapClick.php?lat=39.95693000000006&lon=-105.38082999999995

REQUIRED WAIVER: If you have not already done so, you must sign the updated waiver with our new meetup name prior to this hike. I will have copies at the trailhead that you can sign or you may print, sign, and bring it with you from the following website: https://www.dropbox.com/s/p728z28jjuwdzws/Waiver%20Corona.pdf?dl=0 If you choose to sign at the trailhead, please arrive early so that we can depart for the hike timely.