Deer Creek Island, located within Deer Creek Reservoir, offers a freshwater snorkeling experience around its perimeter. The site features rocky structures, particularly on the western side, which provide cover for local fish populations. Depths at the island range from 1 to 7 metres, with an average depth of 4 metres. Visibility typically fluctuates between 3 and 10 metres. Water temperatures vary significantly due to stratification, ranging from near freezing in winter to the low 70s °F (23°C) at the surface during summer. Access is available via both shore and boat, and the site is suitable for beginners.

Deer Creek Reservoir offers a shallow shore dive featuring both natural reef and artificial reef structures. With depths ranging from 1 to 4 metres and an average of 2 metres, this site provides a practical environment for beginner divers. Visibility typically fluctuates between 3 and 10 metres. Divers should be aware of potential boat traffic and use a marker buoy at all times. Shore entry requires caution due to the presence of surf and shore break. Water temperatures can drop to 7°C in early spring, necessitating appropriate exposure protection. On-site facilities include parking, toilets, and showers to assist with dive logistics.

Deer Creek Reservoir at Rainbow Landing offers a shallow, shore-entry dive suitable for beginners. The site features depths ranging from 1 to 3 metres with an average of 2 metres and visibility around 5 metres. Divers can explore the area year-round, with night diving also permitted. Due to the high-altitude location, water temperatures vary significantly, reaching 18-24°C in summer while approaching freezing in winter. Thermal protection is recommended for all dives. Hazards include cold water and frequent boat traffic; divers should maintain a constant lookout for vessels and remain close to the shore to minimise exposure to passing boats.

Wallsburg Bay is located at the southwest end of Deer Creek Reservoir. This freshwater site features a combination of reef and seagrass topography, with an average depth of 4 metres and a maximum depth of 6 metres. Shore entry is available, and the site is suitable for beginners. Visibility typically ranges between 5 and 10 metres. Water temperatures fluctuate significantly, from 4°C in winter to 23°C in summer, with potential thermoclines. Divers should be aware of cold water safety and canyon winds that can develop in the afternoons. Facilities at the reservoir include parking, toilets, showers, changing rooms, rinse stations, and air fills.

Sailboat Beach (Ledges) is a popular shore-entry site in Deer Creek Reservoir. The underwater topography is defined by distinct ledges located at approximately 6, 15, and 24 metres, following the natural slope of the shoreline. Divers encounter a mix of rocky outcrops and silty bottoms. Conditions are variable, with visibility typically ranging between 2 and 3 metres. Thermal stratification and cooler pockets are common throughout the water column. The site is suitable for beginners, with an average depth of 10 metres and mild currents. Divers should remain aware of boat traffic in the area. Facilities available at the site include parking, toilets, showers, and changing rooms.

The Homestead Crater is a unique geothermal cave site located near Deer Creek Reservoir. This freshwater crater features water temperatures consistently between 32 and 35.5 degrees Celsius year-round. Divers and snorkellers access the water from the shore, exploring depths ranging from 3 to 14 metres with an average depth of 12 metres. Visibility typically spans 10 to 15 metres. As the site sits at an altitude of approximately 1,830 metres, it is classified as an altitude dive. Facilities on-site include parking, toilets, showers, changing rooms, air fills, equipment rental, and a dive shop offering guided tours. Reservations are required for all diving activities.

Hailstone Swim Beach at Deer Creek Reservoir offers a designated, roped-off wakeless zone suitable for beginner snorkelers. The site features a sandy shore entry, providing a controlled environment for those new to the activity. Facilities available at the location include parking, toilets, showers, and equipment rental. Divers and snorkelers should remain aware of potential boat traffic in the surrounding reservoir waters and prepare for cold water temperatures. The site is managed as part of the local state park infrastructure, ensuring accessible entry points for visitors.

The Jordanelle Islands consist of a series of small, rocky submerged structures located approximately 200 metres from the shore of Deer Creek Reservoir. These formations provide the most notable underwater topography in the reservoir. Divers and snorkellers can expect depths ranging from 3 to 6 metres, with an average of 5 metres. Access to the site requires a boat. Conditions include mild currents and visibility between 3 and 6 metres. Water temperatures remain consistently cold, ranging from 4 to 24 degrees Celsius depending on the season, necessitating the use of a wetsuit. Hazards include boat traffic, cold water, entanglement risks, and low visibility.