Boston Marathon logo
BOSTON MARATHON 2023

Stephen Thoma

Bib: 3113•M

CO

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 6%
Gender (Male)
#0 / 15176
Top 10%
Masters (Masters Men)
#0 / 9891
Top 3%
Division (M50-54)
#0 / 2052
Top 1%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:33
Rank: #1408
Start → 5K
19:33 | 6:18/mi
10K· 6.21 mi
38:47
Rank: #1347 (+61)
5K → 10K
19:14 | 6:11/mi
15K· 9.32 mi
58:04
Rank: #1291 (+56)
10K → 15K
19:17 | 6:12/mi
20K· 12.43 mi
1:17:54
Rank: #1374 (-83)
15K → 20K
19:50 | 6:23/mi
Half· 13.11 mi
1:22:13
Rank: #1397 (-23)
20K → Half
4:19 | 6:20/mi
25K· 15.53 mi
1:38:09
Rank: #1561 (-164)
Half → 25K
15:56 | 6:34/mi
30K· 18.64 mi
1:58:27
Rank: #1559 (+2)
25K → 30K
20:18 | 6:32/mi
20M
2:07:20
Rank: #1551 (+8)
30K → 20M
8:53 | 6:32/mi
21M
2:14:15
Rank: #1543 (+8)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:19:02
Rank: #1545 (-2)
21M → 35K
4:47 | 6:24/mi
23M
2:27:23
Rank: #1546 (-1)
35K → 23M
8:21 | 6:40/mi
24M
2:33:50
Rank: #1548 (-2)
23M → 24M
6:27 | 6:27/mi
40K· 24.85 mi
2:39:24
Rank: #1529 (+19)
24M → 40K
5:34 | 6:31/mi
25.2M
2:41:47
Rank: #1527 (+2)
40K → 25.2M
2:23 | 6:55/mi
Finish· 26.22 mi
2:48:19
Rank: #1522 (+5)
25.2M → Finish
6:32 | 6:25/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
Time1:22:13
Pace6:16 /mi
2nd Half
Distance13.11 mi
Time1:26:06
Pace6:34 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:0119:336:1819:33
6:18
-
10K
6.21 mi10:40:1538:476:1419:14
6:11
-0:07
15K
9.32 mi10:59:3258:046:1419:17
6:12
+0:01
20K
12.43 mi11:19:221:17:546:1619:50
6:23
+0:11
Half
13.11 mi11:23:411:22:136:164:19
6:20
-0:03
25K
15.53 mi11:39:371:38:096:1915:56
6:34
+0:14
30K
18.64 mi11:59:551:58:276:2120:18
6:32
-0:02
20M
20.00 mi12:08:482:07:206:228:53
6:32
0:00
21M
21.00 mi12:15:432:14:156:246:55
6:55
+0:23
35K
21.75 mi12:20:302:19:026:244:47
6:24
-0:31
23M
23.00 mi12:28:512:27:236:248:21
6:40
+0:16
24M
24.00 mi12:35:182:33:506:256:27
6:27
-0:13
40K
24.85 mi12:40:522:39:246:255:34
6:31
+0:04
25.2M
25.20 mi12:43:152:41:476:252:23
6:55
+0:24
Finish
26.22 mi12:49:472:48:196:256:32
6:25
-0:30

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

6:11 /mi

Average Pace

6:25 /mi

Slowest Pace

6:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:39:01

94% of race

Time at Steady Pace

9:18

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:25 /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 mi10:21:0119:336:1819:33
6:18
#1408
10K
6.21 mi10:40:1538:476:1419:14
6:11
#1347
15K
9.32 mi10:59:3258:046:1419:17
6:12
#1291
20K
12.43 mi11:19:221:17:546:1619:50
6:23
#1374
Half
13.11 mi11:23:411:22:136:164:19
6:20
#1397
25K
15.53 mi11:39:371:38:096:1915:56
6:34
#1561
30K
18.64 mi11:59:551:58:276:2120:18
6:32
#1559
20M
20.00 mi12:08:482:07:206:228:53
6:32
#1551
21M
21.00 mi12:15:432:14:156:246:55
6:55
#1543
35K
21.75 mi12:20:302:19:026:244:47
6:24
#1545
23M
23.00 mi12:28:512:27:236:248:21
6:40
#1546
24M
24.00 mi12:35:182:33:506:256:27
6:27
#1548
40K
24.85 mi12:40:522:39:246:255:34
6:31
#1529
25.2M
25.20 mi12:43:152:41:476:252:23
6:55
#1527
Finish
26.22 mi12:49:472:48:196:256:32
6:25
#1522
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi1408133813381263(Top 5%)1203(Top 8%)1203(Top 59%)
10K6.21 mi3.10 mi1347+611281+571281+571318(Top 5%)1255(Top 8%)1255(Top 61%)
15K9.32 mi3.11 mi1291+561228+531228+531263(Top 5%)1203(Top 8%)1203(Top 59%)
20K12.43 mi3.11 mi1374-831308-801308-801721(Top 6%)1647(Top 11%)1647(Top 80%)
Half13.11 mi0.68 mi1397-231331-231331-231856(Top 7%)1781(Top 12%)1781(Top 87%)
25K15.53 mi2.42 mi1561-1641493-1621493-1622530(Top 10%)2420(Top 16%)2420(Top 118%)
30K18.64 mi3.11 mi1559+21490+31490+31687(Top 6%)1614(Top 11%)1614(Top 79%)
20M20.00 mi1.36 mi1551+81481+91481+91580(Top 6%)1508(Top 10%)1508(Top 73%)
21M21.00 mi1.00 mi1543+81475+61475+61807(Top 7%)1719(Top 11%)1719(Top 84%)
35K21.75 mi0.75 mi1545-21476-11476-11926(Top 7%)1830(Top 12%)1830(Top 89%)
23M23.00 mi1.25 mi1546-1147614762024(Top 8%)1914(Top 13%)1914(Top 93%)
24M24.00 mi1.00 mi1548-21479-31479-31878(Top 7%)1764(Top 12%)1764(Top 86%)
40K24.85 mi0.85 mi1529+191459+201459+201552(Top 6%)1462(Top 10%)1462(Top 71%)
25.2M25.20 mi0.35 mi1527+21458+11458+11453(Top 5%)1370(Top 9%)1370(Top 67%)
Finish26.22 mi1.02 mi1522+51455+31455+32048(Top 8%)1903(Top 13%)1903(Top 93%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1263

Males

1203

M50-54

1203

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1318

Males

1255

M50-54

1255

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1263

Males

1203

M50-54

1203

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1721

Males

1647

M50-54

1647

20K→Half

12.4 - 13.1 mi

Top 7%
×2stories
+19ft-37ft

Overall

1856

Males

1781

M50-54

1781

Half→25K

13.1 - 15.5 mi

Top 10%
×4stories
+66ft-88ft

Overall

2530

Males

2420

M50-54

2420

25K→30K

15.5 - 18.6 mi

Top 6%
×9stories
+181ft-148ft

Overall

1687

Males

1614

M50-54

1614

30K→20M

18.6 - 20.0 mi

Top 6%
×5stories
+64ft-50ft

Overall

1580

Males

1508

M50-54

1508

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1807

Males

1719

M50-54

1719

21M→35K

21.0 - 21.8 mi

Top 7%
×7stories
+17ft-86ft

Overall

1926

Males

1830

M50-54

1830

35K→23M

21.8 - 23.0 mi

Top 8%
×5stories
+23ft-63ft

Overall

2024

Males

1914

M50-54

1914

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

1878

Males

1764

M50-54

1764

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1552

Males

1462

M50-54

1462

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1453

Males

1370

M50-54

1370

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2stories
+22ft-21ft

Overall

2048

Males

1903

M50-54

1903

Passing Analysis

Category:
Athletes Passed
449
Passed By
563
Net Change
-114
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1408
5K → 10K9938+61#1408#1347
10K → 15K8226+56#1347#1291
15K → 20K17100-83#1291#1374
20K → Half427-23#1374#1397
Half → 25K6170-164#1397#1561
25K → 30K5351+2#1561#1559
30K → 20M3022+8#1559#1551
20M → 21M2820+8#1551#1543
21M → 35K1315-2#1543#1545
35K → 23M2425-1#1545#1546
23M → 24M2527-2#1546#1548
24M → 40K3516+19#1548#1529
40K → 25.2M108+2#1529#1527
25.2M → Finish2318+5#1527#1522
TOTALS449563-114
📊

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