Issaquah Schools Foundation Monster Mash 5K

About the Event

Help us raise a MONSTROUS amount of support for local students on October 24th! ISF Monster Mash 5K is a community-based, family-friendly event that raises funds for programs that serve students attending all 27 ISD schools.

We welcome all-ages and abilities. Convenient onsite parking, phased start times, and a professionally chip-timed course ensure a great experience for all. You’ll appreciate the flat, paved, out-and-back route whether you’re setting a new 5K PR or enjoying a brisk walk together as a family! Bring your creativity – festive costumes are encouraged!

This event sells out every year, so don't wait to register! Every registration submitted by October 12th receives a 2026 Monster Mash technical race tee & medal. Registrants receive free event photos and raffle tickets for prizes as well! Placement awards for fastest finishing times will also be presented. See below for details.

Races Offered

In-Person 5K

Oct 24, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

10:00

sell

$35.00

Virtual 5K

Oct 24, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

10:00

sell

$35.00

Weather History

These values represent the 3-year monthly averages for October in Issaquah.

thermostat Temperature

7.5° / 16.1°

wb_sunny Feels like

5.2° / 14.4°

light_mode Avg sunshine hours

6h 42m

water_drop Avg rainfall

5.2 mm

ac_unit Avg snowfall

—

air Avg wind speed

8.1 km/h (Light breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Low (2.8)

humidity_mid Humidity

81.6%

wb_twilight Sunrise

07:28

nightlight Sunset

18:18

About Issaquah

Learn more about the host city, Issaquah.

Issaquah is a city of 40,000 people (2019) in King County in the Puget Sound region of Washington State. Its historic downtown is a popular base for hiking in the foothills of the Cascades.

Hotels & Places to Stay

Race Results

Official finishing times from previous editions of Issaquah Schools Foundation Monster Mash 5K.

Place	Name	Gender	Age	City	Time
🥇	Z Justus	M	24	Maple Valley, WA	16:11.42
🥈	John Christopher	M	47	Seattle, WA	18:11.06
🥉	Jared Putney	M	25	Issaquah, WA	19:33.05
4	Kennan Schrag	M	28	Issaquah, WA	19:33.55
5	Jordan Crist	M	25	Issaquah, WA	19:33.66
6	Ashley Maton	F	31	Issaquah, WA	19:33.69
7	Larissa Kolasinski	F	28	Issaquah, WA	19:33.71
8	James Johnson	M	34	Bellevue, WA	19:39.1
9	Dyllan Gritter	M	27	Renton, WA	19:46.98
10	Matthew Arroues	M	35	Sammamish, WA	20:27.06
11	Ali Riddick	F	13	Bellevue, WA	20:31.22
12	Mike Williamson	M	58	Redmond, WA	20:34.99
13	Thomas Cottenier	M	46	Sammamish, WA	20:38.74
14	A. Beaudoin	M	12	Bellevue, WA	20:41.92
15	R. Kloster	M	11	Issaquah, WA	20:50.34
16	C. McMeekin	M	12	Issaquah, WA	21:22.31
17	Thomas Bashford	M	38	Renton, WA	21:23.99
18	Fikir Bizuneh	M	37	Issaquah, WA	21:29.3
19	MQ Tran	M	52	Renton, WA	21:39.29
20	M. Marshall	M	12	Newcastle, WA	21:47.37
21	Xiaodong Xu	M	45	Sammamish, WA	21:54.48
22	D. Gaffney	M	12	Issaquah, WA	22:06.12
23	Bryce Kloster	M	45	Issaquah, WA	22:18.49
24	Josh Butchart	M	45	Bellevue, WA	22:23.21
25	M. Ber	M	11	Issaquah, WA	22:31.73
26	T. Woody	M	10	Bellevue, WA	22:33.36
27	G. Velazquez	M	10	Kirkland, WA	22:36.59
28	Jason Broenneke	M	48	Sammamish, WA	22:45.02
29	Aston Lim	M	13	Issaquah, WA	22:47.95
30	Jackson Stagg	M	14	Sammamish, WA	22:56.89
31	Silas Marshall	M	48	Newcastle, WA	22:56.93
32	Thomas Stagg	M	47	Sammamish, WA	22:58.38
33	S. Stagg	M	9	Sammamish, WA	22:59.22
34	Karlee Deatherage	F	34	Everett, WA	23:02.41
35	Garrett Broenneke	M	13	Sammamish, WA	23:06.25
36	Andy Ho	M	39	Renton, WA	23:06.76
37	Cooper Wahlin	M	16	Issaquah, WA	23:22.08
38	Tracy Pleiman	F	55	Issaquah, WA	23:22.26
39	Konstantin Ber	M	49	Issaquah, WA	23:41.65
40	A. Lee	F	8	Sammamish, WA	23:53.11
41	Annika McMeekin	F	49	Issaquah, WA	23:54.01
42	Molly Hurd	F	63	Sammamish, WA	23:55.05
43	Zain Diwan	M	13	Issaquah, WA	24:11.13
44	Blake Zalewski	M	13	Issaquah, WA	24:12.84
45	M. Upton-Weber	F	10	Sammamish, WA	24:18.43
46	Leslie Johnson	F	44	Snoqualmie, WA	24:23.56
47	Spencer Bakke	M	32	Issaquah, WA	24:23.91
48	Riley Harper	M	25	Bellevue, WA	24:27.15
49	Melissa Hathaway	F	46	Issaquah, WA	24:29.81
50	Mendel Guillaume	M	46	Issaquah, WA	24:35.81