Boston Marathon logo
BOSTON MARATHON 2023

Matt Stemrich

Bib: 7025•M

WI

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 25%
Gender (Male)
#0 / 15176
Top 39%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:47
Rank: #6313
Start → 5K
21:47 | 7:01/mi
10K· 6.21 mi
44:06
Rank: #7083 (-770)
5K → 10K
22:19 | 7:11/mi
15K· 9.32 mi
1:06:33
Rank: #7349 (-266)
10K → 15K
22:27 | 7:14/mi
20K· 12.43 mi
1:29:01
Rank: #7290 (+59)
15K → 20K
22:28 | 7:14/mi
Half· 13.11 mi
1:33:46
Rank: #7248 (+42)
20K → Half
4:45 | 6:58/mi
25K· 15.53 mi
1:51:32
Rank: #7249 (-1)
Half → 25K
17:46 | 7:20/mi
30K· 18.64 mi
2:14:54
Rank: #7208 (+41)
25K → 30K
23:22 | 7:31/mi
20M
2:25:18
Rank: #7219 (-11)
30K → 20M
10:24 | 7:39/mi
21M
2:33:05
Rank: #7115 (+104)
20M → 21M
7:47 | 7:47/mi
35K· 21.75 mi
2:38:31
Rank: #7093 (+22)
21M → 35K
5:26 | 7:16/mi
23M
2:47:59
Rank: #7023 (+70)
35K → 23M
9:28 | 7:34/mi
24M
2:55:09
Rank: #6922 (+101)
23M → 24M
7:10 | 7:10/mi
40K· 24.85 mi
3:01:25
Rank: #6851 (+71)
24M → 40K
6:16 | 7:20/mi
25.2M
3:04:09
Rank: #6806 (+45)
40K → 25.2M
2:44 | 7:56/mi
Finish· 26.22 mi
3:11:28
Rank: #6761 (+45)
25.2M → Finish
7:19 | 7:11/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:46
Pace7:09 /mi
2nd Half
Distance13.11 mi
Time1:37:42
Pace7:27 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:26:1821:477:0121:47
7:01
-
10K
6.21 mi10:48:3744:067:0622:19
7:11
+0:10
15K
9.32 mi11:11:041:06:337:0822:27
7:14
+0:03
20K
12.43 mi11:33:321:29:017:1022:28
7:14
0:00
Half
13.11 mi11:38:171:33:467:094:45
6:58
-0:16
25K
15.53 mi11:56:031:51:327:1117:46
7:20
+0:22
30K
18.64 mi12:19:252:14:547:1423:22
7:31
+0:11
20M
20.00 mi12:29:492:25:187:1610:24
7:39
+0:08
21M
21.00 mi12:37:362:33:057:177:47
7:47
+0:08
35K
21.75 mi12:43:022:38:317:175:26
7:16
-0:31
23M
23.00 mi12:52:302:47:597:189:28
7:34
+0:18
24M
24.00 mi12:59:402:55:097:187:10
7:10
-0:24
40K
24.85 mi13:05:563:01:257:186:16
7:20
+0:10
25.2M
25.20 mi13:08:403:04:097:182:44
7:56
+0:36
Finish
26.22 mi13:15:593:11:287:187:19
7:11
-0:45

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

6:58 /mi

Average Pace

7:18 /mi

Slowest Pace

7:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:00:57

95% of race

Time at Steady Pace

10:31

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:18 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:26:1821:477:0121:47
7:01
#6313
10K
6.21 mi10:48:3744:067:0622:19
7:11
#7083
15K
9.32 mi11:11:041:06:337:0822:27
7:14
#7349
20K
12.43 mi11:33:321:29:017:1022:28
7:14
#7290
Half
13.11 mi11:38:171:33:467:094:45
6:58
#7248
25K
15.53 mi11:56:031:51:327:1117:46
7:20
#7249
30K
18.64 mi12:19:252:14:547:1423:22
7:31
#7208
20M
20.00 mi12:29:492:25:187:1610:24
7:39
#7219
21M
21.00 mi12:37:362:33:057:177:47
7:47
#7115
35K
21.75 mi12:43:022:38:317:175:26
7:16
#7093
23M
23.00 mi12:52:302:47:597:189:28
7:34
#7023
24M
24.00 mi12:59:402:55:097:187:10
7:10
#6922
40K
24.85 mi13:05:563:01:257:186:16
7:20
#6851
25.2M
25.20 mi13:08:403:04:097:182:44
7:56
#6806
Finish
26.22 mi13:15:593:11:287:187:19
7:11
#6761
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi6313574957497956(Top 30%)6890(Top 45%)6890(Top 130%)
10K6.21 mi3.10 mi7083-7706318-5696318-5697967(Top 30%)6914(Top 46%)6914(Top 131%)
15K9.32 mi3.11 mi7349-2666514-1966514-1967956(Top 30%)6890(Top 45%)6890(Top 130%)
20K12.43 mi3.11 mi7290+596459+556459+557287(Top 27%)6413(Top 42%)6413(Top 121%)
Half13.11 mi0.68 mi7248+426428+316428+316346(Top 24%)5756(Top 38%)5756(Top 109%)
25K15.53 mi2.42 mi7249-16418+106418+107440(Top 28%)6442(Top 42%)6442(Top 122%)
30K18.64 mi3.11 mi7208+416370+486370+487346(Top 28%)6288(Top 41%)6288(Top 119%)
20M20.00 mi1.36 mi7219-116359+116359+117808(Top 29%)6468(Top 43%)6468(Top 122%)
21M21.00 mi1.00 mi7115+1046275+846275+846086(Top 23%)5255(Top 35%)5255(Top 99%)
35K21.75 mi0.75 mi7093+226249+266249+266874(Top 26%)5808(Top 38%)5808(Top 110%)
23M23.00 mi1.25 mi7023+706167+826167+826786(Top 25%)5684(Top 37%)5684(Top 108%)
24M24.00 mi1.00 mi6922+1016079+886079+885556(Top 21%)4818(Top 32%)4818(Top 91%)
40K24.85 mi0.85 mi6851+716012+676012+675643(Top 21%)4790(Top 32%)4790(Top 91%)
25.2M25.20 mi0.35 mi6806+455973+395973+396050(Top 23%)4981(Top 33%)4981(Top 94%)
Finish26.22 mi1.02 mi6761+455928+455928+456276(Top 24%)5115(Top 34%)5115(Top 97%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 30%
×21stories
+97ft-345ft

Overall

7956

Males

6890

M18-39

6890

5K→10K

3.1 - 6.2 mi

Top 30%
×5stories
+79ft-138ft

Overall

7967

Males

6914

M18-39

6914

10K→15K

6.2 - 9.3 mi

Top 30%
×3stories
+67ft-78ft

Overall

7956

Males

6890

M18-39

6890

15K→20K

9.3 - 12.4 mi

Top 27%
×5stories
+106ft-86ft

Overall

7287

Males

6413

M18-39

6413

20K→Half

12.4 - 13.1 mi

Top 24%
×2stories
+19ft-37ft

Overall

6346

Males

5756

M18-39

5756

Half→25K

13.1 - 15.5 mi

Top 28%
×4stories
+66ft-88ft

Overall

7440

Males

6442

M18-39

6442

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

7346

Males

6288

M18-39

6288

30K→20M

18.6 - 20.0 mi

Top 29%
×5stories
+64ft-50ft

Overall

7808

Males

6468

M18-39

6468

20M→21M

20.0 - 21.0 mi

Top 23%
×8stories
+106ft-24ft

Overall

6086

Males

5255

M18-39

5255

21M→35K

21.0 - 21.8 mi

Top 26%
×7stories
+17ft-86ft

Overall

6874

Males

5808

M18-39

5808

35K→23M

21.8 - 23.0 mi

Top 25%
×5stories
+23ft-63ft

Overall

6786

Males

5684

M18-39

5684

23M→24M

23.0 - 24.0 mi

Top 21%
×6stories
+12ft-82ft

Overall

5556

Males

4818

M18-39

4818

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

5643

Males

4790

M18-39

4790

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6050

Males

4981

M18-39

4981

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2stories
+22ft-21ft

Overall

6276

Males

5115

M18-39

5115

Passing Analysis

Category:
Athletes Passed
1153
Passed By
1601
Net Change
-448
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6313
5K → 10K20790-770#6313#7083
10K → 15K53319-266#7083#7349
15K → 20K14182+59#7349#7290
20K → Half497+42#7290#7248
Half → 25K8182-1#7248#7249
25K → 30K141100+41#7249#7208
30K → 20M5566-11#7208#7219
20M → 21M11915+104#7219#7115
21M → 35K4826+22#7115#7093
35K → 23M11545+70#7093#7023
23M → 24M11110+101#7023#6922
24M → 40K9120+71#6922#6851
40K → 25.2M549+45#6851#6806
25.2M → Finish7530+45#6806#6761
TOTALS11531601-448
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing