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Please note that Gross Reservoir will be under going an expansion project that will impact recreational activities at Gross Reservoir this season and beyond. While the reservoir will remain open throughout construction, there will be some changes and areas that are temporarily closed. Please see the Gross Reservoir website, linked above, or the info graphic below for the anticipated schedule and impacts.

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Directions:  From Boulder, take Flagstaff Road west until it turns into Gross Dam Road.  Follow Gross Dam Road to the South Access Area, park and follow signs to Osprey Point.  From Denver, take I-70 W to 93 North.  Turn West on Hwy 72 to Gross Dam Road.  Follow Gross Dam Road down towards the reservoir, when you see the park sign and map, turn left and follow the road to the south access point.

This is a pleasant, short trail, with very few people, along the south shore of Gross Reservoir.  Your destination is the inlet where South Boulder Creek enters the Reservoir.  From the picnic tables at the trailhead, head into the woods, gain a little elevation and travel through the woods looking out on the Reservoir.  Before too long, you'll descend down to S. Boulder Creek.  The trail continues along S. Boulder Creek and you can boulder hop for a long time.  There are a number of social trails in this area allowing you to explore further back along S. Boulder Creek.  If you follow the creek for long enough, you would eventually reach Pinecliff.  Following the Creek for just a mile or so, provides for a very private, relaxing hike.

Be sure to check out the various viewpoints before leaving Gross Reservoir the views of the reservoir with the Indian Peaks in the distance are spectacular.