# Wading pools and spray parks at Beacon Mountain Spraypark (Jefferson Park) — hours & season

Jefferson Park is a 52.4-acre Seattle park established in 1898 and designed by the Olmsted Brothers, offering excellent views of the Duwamish River, downtown Seattle, Olympic Mountains, and Puget Sound. Beacon Mountain is a creative play area within the park featuring splash pads, zip lines, climbing structures, and interactive educational elements about Cascade peaks.

**Beacon Mountain Spraypark (Jefferson Park): 4AM-11:30PM.** _(as of 2026-09-28T08:30:02.928Z)_

- **Address:** 3801 Beacon Ave S, Seattle, WA 98108
- **Hours:** 4AM-11:30PM
- **Parking:** Two accessible parking stalls and accessible ramp off 16th Ave S under construction (Spring 2025 - Summer 2025)
- **Notes:** Restrooms have warm water; some picnic areas are covered; park was requisitioned by U.S. Army during WWII and used as G.I. recreation center with anti-aircraft batteries; old reservoir was covered over 2008-2009 (supported by 624 columns) to create additional park space

## Common questions

### When is Beacon Mountain Spraypark (Jefferson Park) open?

Beacon Mountain Spraypark (Jefferson Park) is open 4AM-11:30PM.

_Data as of the dates shown · Sources: web research_

[Get the app](https://apps.apple.com/app/id6789044831?mt=8&ct=t_JNXRHSC7FZ)
[Open Gatherly](https://gatherly.vohulabs.com/explore?src=t_JNXRHSC7FZ)