About the Summer Sizzler- Denver
The Summer Sizzler runs early in the morning, which is the right call for a summer race in Thornton. Several distance options are on the course, from a short kids dash up through longer routes, so groups with mixed goals tend to show up together. Age group awards go deep, covering a wide range of brackets.
Packet pickup opens on race morning well before the start, so there is no need to make a separate trip the day before. Results and awards are posted at the registration tent right after you finish, so you can stick around and see where you landed without waiting long.
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Summer Sizzler- Denver 2026 Results
Going by the 2026 results, this is a small, friendly field, and the spread of finish times is wide, so this is a mostly recreational race rather than one for club runners.
5K Results · 2026
72finishers
20:46winner
41:35median
1:08:31cutoff
Top 3: Royce Guerrero (20:46) · Ilianna Surowiec (21:07) · Peter Kosiarski (22:50)
10K Results · 2026
48finishers
49:00winner
1:06:40median
1:38:51cutoff
Top 3: Nicholas Shepherd (49:00) · Allison Schuler (53:03) · Cody Schuler (53:04)
Overall Results · 2025
33finishers
1:08:08winner
1:40:06median
2:12:00cutoff
Top 3: Tyler Davis (1:08:08) · Julie Shah (1:11:47) · Nate Southam (1:13:39)
Overall Results · 2026
13finishers
1:09:33winner
1:31:02median
2:09:56cutoff
Top 3: Griffin Lawler (1:09:33) · Cassie Sterns (1:11:14) · Daniel Garcia (1:14:17)
The Summer Sizzler- Denver has been held every year since at least 2022. That is as far back as RunSignup's records for this race go, so it may well be older.
How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Oct 25, 2026.
Distances & Start Times
50m8/7/2027 07:00$17
1 Mile8/7/2027 07:00$22
3.1 Miles8/7/2027 07:00$32
6.2 Miles8/7/2027 07:00$32
15K8/7/2027 07:00$32
Virtual Race8/7/2027 07:00$42
Volunteer and Run8/7/2027 07:00$17
Going for a Time?
Set a goal and get a pace band: every mile split on a card sized for your phone lock screen, so race morning needs no math.
Not sure what to aim for? The 5K pace chart lists the pace for every finish time.
Where to Stay
Traveling for this race? The map shows hotels and rentals in and around Denver — pan or zoom to compare what's nearby.
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