Horsetooth Reservoir
Located in the foothills west of Fort Collins at an elevation of 5,430 feet, Horsetooth Reservoir
is 1,900 acres of water surrounded by 2,000 acres of public land. It is popular for fishing, boating, water-skiing, and camping.
This 6.5-mile reservoir is open year round and is a part of the Colorado-Big
Thompson Project operated by the Bureau of Reclamation and the Northern
Colorado Water Conservancy District. The purpose of this water project is to divert water from the west slope to
the east slope for drinking water, irrigation, and hydropower generation.
The Bureau of Reclamation is solely responsible for power generation. The agencies jointly
manage water levels for irrigation, municipal, and industry use.
Recreation is managed by Larimer County Natural Resources. Park Entrance Permits and Camping Fees are required.
General Regulations
For specifics, ask a ranger for a copy of the
Regulations Brochure.
- Life preservers of the appropriate sizing are required for each person on a boat, and must be worn by children at all times. In addition, a Type IV throwable PFD is required on boats longer than 16 feet.
- Boat travel direction - counter clockwise.
- An observer (in addition to the driver) must be on the boat during water-skiing activity.
- Swimming is prohibited except at the swim beach in South Bay. Days & hours of operation may vary. Call 970-679-4570 for current hours.
- Cliff diving or jumping in the water is extremely dangerous and prohibited in all areas.
- Quiet hours are 10 p.m. to 6 a.m.
- Collection of firewood, including cutting of trees and branches, is not allowed.
- Firearms or fireworks are prohibited.
- Glass containers are not allowed.
- Public consumption of alcohol above 3.2% is prohibited (no kegs allowed).
- Dogs must be on leashes not longer than 10 feet at all times. Dogs are not allowed at the swim beach.
- Due to Homeland Security restrictions, no recreation activity is allowed on dams or within 100 feet of dams when on land.
- Direction of travel is counter-clockwise.
- Call the Horsetooth Reservoir Hotline at 970-679-4554 for current conditions.
- State law requires boat and jet ski operators to be 16 years of age or older. (14-16 year olds may take a boating safety course for a driving certificate - contact a park ranger for more info)
- Water-skiing is best early mornings and evenings during the week.
- Water-skiers must have an observer and use a red or orange flag.
- Personal water crafts (jet skis, wave runners) must observe state laws - NO careless and improper operation, including:
- Operating a vessel while facing backward.
- Becoming airborne while crossing a wake too close to another vessel.
- Unsafe weaving through boat traffic.
- Causing another boat to swerve or abruptly cut speed to avoid a collision.
- Boat Registration Information
- Electrical, tent, camper cabins.
- Campground hosts on duty during the summer.
- April - October, you can reserve sites at Horsetooth Reservoir, Carter Lake, Flatiron Reservoir, and Pinewood Lake. November - March most sites are available on a first-come, first-served basis.
- A permit to camp is required for each campsite for each night (in addition to Park Entrance Permits).
- Maximum of 14 nights in any 30-day period.
- Required of all visitors.
- Valid at Horsetooth Reservoir, Horsetooth Mountain Open Space, Carter Lake, Pinewood Reservoir, Flatiron Reservoir, and Ramsay-Shockey Open Space.
- Annual Park Entrance Permits (valid for the calendar year) are available at The Bison Visitor Center, at entrance stations prior to entering the park, at the Citizen Information Center, at nearby retail outlets, and online.
- Daily Park Entrance Permits (valid from day of purchase until noon the next day) are available at The Bison Visitor Center and at entrance stations and self-serve stations prior to entering the parks and open lands.
- No ice fishing - ice is UNSAFE due to fluctuating water levels.
- Horsetooth provides a wide variety of fishing opportunities. This large reservoir has excellent structure for anglers to explore. Whether
you pursue fish from shore or from a boat, you will have a wide variety of angling opportunities.
- Water levels fluctuate. Horsetooth Reservoir generally fills during the winter and spring.
It normally fluctuates up to 60 feet, with the lowest water being in mid September, excluding drought and excessive rain years.
- Weekdays during the summer - plenty of room for both camping and boating.
- Weekends during the summer - capacity is usually reached.
- Firewood can be purchased at adjacent stores (no firewood collection allowed in the parks).
Horsetooth Reservoir - Inlet Bay Trail
Directions to Trailhead
- Access from Field of Dreams at C.R. 38E & Shoreline Drive, or from Soderberg Open Space Trailhead on Minuteman Drive.
Trail Information
- 1.75 mile trail - easy hiking, mountain biking, horseback riding