Boston Marathon logo
BOSTON MARATHON 2023

Spencer Smith

Bib: 5693•M

MO

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 20%
Gender (Male)
#0 / 15176
Top 33%
Masters (Masters Men)
#0 / 9891
Top 19%
Division (M40-44)
#0 / 2241
Top 43%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:26
Rank: #5542
Start → 5K
21:26 | 6:54/mi
10K· 6.21 mi
42:28
Rank: #5257 (+285)
5K → 10K
21:02 | 6:46/mi
15K· 9.32 mi
1:03:06
Rank: #4706 (+551)
10K → 15K
20:38 | 6:38/mi
20K· 12.43 mi
1:23:47
Rank: #4273 (+433)
15K → 20K
20:41 | 6:39/mi
Half· 13.11 mi
1:28:16
Rank: #4203 (+70)
20K → Half
4:29 | 6:34/mi
25K· 15.53 mi
1:44:58
Rank: #4296 (-93)
Half → 25K
16:42 | 6:53/mi
30K· 18.64 mi
2:06:16
Rank: #4065 (+231)
25K → 30K
21:18 | 6:51/mi
20M
2:15:42
Rank: #4013 (+52)
30K → 20M
9:26 | 6:57/mi
21M
2:24:46
Rank: #4688 (-675)
20M → 21M
9:04 | 9:04/mi
35K· 21.75 mi
2:29:59
Rank: #4694 (-6)
21M → 35K
5:13 | 6:58/mi
23M
2:39:25
Rank: #4794 (-100)
35K → 23M
9:26 | 7:32/mi
24M
2:48:11
Rank: #5186 (-392)
23M → 24M
8:46 | 8:46/mi
40K· 24.85 mi
2:55:23
Rank: #5386 (-200)
24M → 40K
7:12 | 8:25/mi
25.2M
2:58:25
Rank: #5438 (-52)
40K → 25.2M
3:02 | 8:48/mi
Finish· 26.22 mi
3:05:55
Rank: #5451 (-13)
25.2M → Finish
7:30 | 7:22/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
Time1:28:16
Pace6:44 /mi
2nd Half
Distance13.11 mi
Time1:37:39
Pace7:27 /mi
📊Positive Split: 10.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:3821:266:5421:26
6:54
-
10K
6.21 mi10:45:4042:286:5021:02
6:46
-0:08
15K
9.32 mi11:06:181:03:066:4620:38
6:38
-0:08
20K
12.43 mi11:26:591:23:476:4520:41
6:39
+0:01
Half
13.11 mi11:31:281:28:166:444:29
6:34
-0:05
25K
15.53 mi11:48:101:44:586:4516:42
6:53
+0:19
30K
18.64 mi12:09:282:06:166:4621:18
6:51
-0:02
20M
20.00 mi12:18:542:15:426:479:26
6:57
+0:06
21M
21.00 mi12:27:582:24:466:549:04
9:04
+2:07
35K
21.75 mi12:33:112:29:596:545:13
6:58
-2:06
23M
23.00 mi12:42:372:39:256:569:26
7:32
+0:34
24M
24.00 mi12:51:232:48:117:008:46
8:46
+1:14
40K
24.85 mi12:58:352:55:237:037:12
8:25
-0:21
25.2M
25.20 mi13:01:372:58:257:053:02
8:48
+0:23
Finish
26.22 mi13:09:073:05:557:067:30
7:22
-1:26

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

6:34 /mi

Average Pace

7:06 /mi

Slowest Pace

9:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:28:25

80% of race

Time at Slower Pace

37:30

20% of race

Average Pace: 7:05 /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 mi10:24:3821:266:5421:26
6:54
#5542
10K
6.21 mi10:45:4042:286:5021:02
6:46
#5257
15K
9.32 mi11:06:181:03:066:4620:38
6:38
#4706
20K
12.43 mi11:26:591:23:476:4520:41
6:39
#4273
Half
13.11 mi11:31:281:28:166:444:29
6:34
#4203
25K
15.53 mi11:48:101:44:586:4516:42
6:53
#4296
30K
18.64 mi12:09:282:06:166:4621:18
6:51
#4065
20M
20.00 mi12:18:542:15:426:479:26
6:57
#4013
21M
21.00 mi12:27:582:24:466:549:04
9:04
#4688
35K
21.75 mi12:33:112:29:596:545:13
6:58
#4694
23M
23.00 mi12:42:372:39:256:569:26
7:32
#4794
24M
24.00 mi12:51:232:48:117:008:46
8:46
#5186
40K
24.85 mi12:58:352:55:237:037:12
8:25
#5386
25.2M
25.20 mi13:01:372:58:257:053:02
8:48
#5438
Finish
26.22 mi13:09:073:05:557:067:30
7:22
#5451
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5542510651063642(Top 14%)3437(Top 23%)3437(Top 153%)
10K6.21 mi3.10 mi5257+2854863+2434863+2434996(Top 19%)4628(Top 30%)4628(Top 207%)
15K9.32 mi3.11 mi4706+5514384+4794384+4793642(Top 14%)3437(Top 23%)3437(Top 153%)
20K12.43 mi3.11 mi4273+4334006+3784006+3783244(Top 12%)3081(Top 20%)3081(Top 137%)
Half13.11 mi0.68 mi4203+703940+663940+663285(Top 12%)3135(Top 21%)3135(Top 140%)
25K15.53 mi2.42 mi4296-934026-864026-864879(Top 18%)4518(Top 30%)4518(Top 202%)
30K18.64 mi3.11 mi4065+2313822+2043822+2043359(Top 13%)3163(Top 21%)3163(Top 141%)
20M20.00 mi1.36 mi4013+523774+483774+483689(Top 14%)3441(Top 23%)3441(Top 154%)
21M21.00 mi1.00 mi4688-6754367-5934367-59313750(Top 52%)9362(Top 62%)9362(Top 418%)
35K21.75 mi0.75 mi4694-64369-24369-25182(Top 19%)4633(Top 31%)4633(Top 207%)
23M23.00 mi1.25 mi4794-1004451-824451-826589(Top 25%)5556(Top 37%)5556(Top 248%)
24M24.00 mi1.00 mi5186-3924760-3094760-30915986(Top 60%)10154(Top 67%)10154(Top 453%)
40K24.85 mi0.85 mi5386-2004917-1574917-15712777(Top 48%)8652(Top 57%)8652(Top 386%)
25.2M25.20 mi0.35 mi5438-524961-444961-4411190(Top 42%)7853(Top 52%)7853(Top 350%)
Finish26.22 mi1.02 mi5451-134965-44965-47480(Top 28%)5847(Top 39%)5847(Top 261%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

3642

Males

3437

M40-44

3437

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

4996

Males

4628

M40-44

4628

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

3642

Males

3437

M40-44

3437

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3244

Males

3081

M40-44

3081

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3285

Males

3135

M40-44

3135

Half→25K

13.1 - 15.5 mi

Top 18%
×4stories
+66ft-88ft

Overall

4879

Males

4518

M40-44

4518

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3359

Males

3163

M40-44

3163

30K→20M

18.6 - 20.0 mi

Top 14%
×5stories
+64ft-50ft

Overall

3689

Males

3441

M40-44

3441

20M→21M

20.0 - 21.0 mi

Top 52%
×8stories
+106ft-24ft

Overall

13750

Males

9362

M40-44

9362

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

5182

Males

4633

M40-44

4633

35K→23M

21.8 - 23.0 mi

Top 25%
×5stories
+23ft-63ft

Overall

6589

Males

5556

M40-44

5556

23M→24M

23.0 - 24.0 mi

Top 60%
×6stories
+12ft-82ft

Overall

15986

Males

10154

M40-44

10154

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

12777

Males

8652

M40-44

8652

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

11190

Males

7853

M40-44

7853

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2stories
+22ft-21ft

Overall

7480

Males

5847

M40-44

5847

Passing Analysis

Category:
Athletes Passed
1996
Passed By
1905
Net Change
+91
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5542
5K → 10K37792+285#5542#5257
10K → 15K5565+551#5257#4706
15K → 20K4352+433#4706#4273
20K → Half744+70#4273#4203
Half → 25K59152-93#4203#4296
25K → 30K25726+231#4296#4065
30K → 20M7523+52#4065#4013
20M → 21M5680-675#4013#4688
21M → 35K3844-6#4688#4694
35K → 23M47147-100#4694#4794
23M → 24M5397-392#4794#5186
24M → 40K11211-200#5186#5386
40K → 25.2M1062-52#5386#5438
25.2M → Finish4760-13#5438#5451
TOTALS19961905+91
📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

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