Boston Marathon logo
BOSTON MARATHON 2023

Jonathan Tomkins

Bib: 1334•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 4%
Gender (Male)
#0 / 15176
Top 6%
Division (M18-39)
#0 / 5285
Top 14%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:10
Rank: #1064
Start → 5K
19:10 | 6:10/mi
10K· 6.21 mi
38:04
Rank: #1026 (+38)
5K → 10K
18:54 | 6:05/mi
15K· 9.32 mi
57:16
Rank: #1066 (-40)
10K → 15K
19:12 | 6:11/mi
20K· 12.43 mi
1:16:26
Rank: #1032 (+34)
15K → 20K
19:10 | 6:10/mi
Half· 13.11 mi
1:20:38
Rank: #1039 (-7)
20K → Half
4:12 | 6:10/mi
25K· 15.53 mi
1:35:41
Rank: #1015 (+24)
Half → 25K
15:03 | 6:12/mi
30K· 18.64 mi
1:55:18
Rank: #979 (+36)
25K → 30K
19:37 | 6:19/mi
20M
2:03:58
Rank: #975 (+4)
30K → 20M
8:40 | 6:23/mi
21M
2:10:42
Rank: #964 (+11)
20M → 21M
6:44 | 6:44/mi
35K· 21.75 mi
2:15:20
Rank: #964
21M → 35K
4:38 | 6:12/mi
23M
2:23:24
Rank: #960 (+4)
35K → 23M
8:04 | 6:27/mi
24M
2:29:40
Rank: #955 (+5)
23M → 24M
6:16 | 6:16/mi
40K· 24.85 mi
2:35:14
Rank: #961 (-6)
24M → 40K
5:34 | 6:31/mi
25.2M
2:37:37
Rank: #960 (+1)
40K → 25.2M
2:23 | 6:55/mi
Finish· 26.22 mi
2:43:56
Rank: #950 (+10)
25.2M → Finish
6:19 | 6:12/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
Time1:20:38
Pace6:09 /mi
2nd Half
Distance13.11 mi
Time1:23:18
Pace6:21 /mi
📊Positive Split: 3.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:3019:106:1019:10
6:10
-
10K
6.21 mi10:38:2438:046:0818:54
6:05
-0:05
15K
9.32 mi10:57:3657:166:0919:12
6:11
+0:06
20K
12.43 mi11:16:461:16:266:0919:10
6:10
-0:01
Half
13.11 mi11:20:581:20:386:094:12
6:10
0:00
25K
15.53 mi11:36:011:35:416:1015:03
6:12
+0:02
30K
18.64 mi11:55:381:55:186:1119:37
6:19
+0:07
20M
20.00 mi12:04:182:03:586:128:40
6:23
+0:04
21M
21.00 mi12:11:022:10:426:136:44
6:44
+0:21
35K
21.75 mi12:15:402:15:206:134:38
6:12
-0:32
23M
23.00 mi12:23:442:23:246:148:04
6:27
+0:15
24M
24.00 mi12:30:002:29:406:146:16
6:16
-0:11
40K
24.85 mi12:35:342:35:146:155:34
6:31
+0:15
25.2M
25.20 mi12:37:572:37:376:152:23
6:55
+0:24
Finish
26.22 mi12:44:162:43:566:156:19
6:12
-0:43

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

6:05 /mi

Average Pace

6:15 /mi

Slowest Pace

6:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:34:49

94% of race

Time at Steady Pace

9:07

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:15 /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 mi10:19:3019:106:1019:10
6:10
#1064
10K
6.21 mi10:38:2438:046:0818:54
6:05
#1026
15K
9.32 mi10:57:3657:166:0919:12
6:11
#1066
20K
12.43 mi11:16:461:16:266:0919:10
6:10
#1032
Half
13.11 mi11:20:581:20:386:094:12
6:10
#1039
25K
15.53 mi11:36:011:35:416:1015:03
6:12
#1015
30K
18.64 mi11:55:381:55:186:1119:37
6:19
#979
20M
20.00 mi12:04:182:03:586:128:40
6:23
#975
21M
21.00 mi12:11:022:10:426:136:44
6:44
#964
35K
21.75 mi12:15:402:15:206:134:38
6:12
#964
23M
23.00 mi12:23:442:23:246:148:04
6:27
#960
24M
24.00 mi12:30:002:29:406:146:16
6:16
#955
40K
24.85 mi12:35:342:35:146:155:34
6:31
#961
25.2M
25.20 mi12:37:572:37:376:152:23
6:55
#960
Finish
26.22 mi12:44:162:43:566:156:19
6:12
#950
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1064100610061175(Top 4%)1121(Top 7%)1121(Top 21%)
10K6.21 mi3.10 mi1026+38970+36970+361013(Top 4%)963(Top 6%)963(Top 18%)
15K9.32 mi3.11 mi1066-401010-401010-401175(Top 4%)1121(Top 7%)1121(Top 21%)
20K12.43 mi3.11 mi1032+34980+30980+30958(Top 4%)910(Top 6%)910(Top 17%)
Half13.11 mi0.68 mi1039-7987-7987-71235(Top 5%)1183(Top 8%)1183(Top 22%)
25K15.53 mi2.42 mi1015+24964+23964+231018(Top 4%)969(Top 6%)969(Top 18%)
30K18.64 mi3.11 mi979+36929+35929+35942(Top 4%)897(Top 6%)897(Top 17%)
20M20.00 mi1.36 mi975+4925+4925+41058(Top 4%)1013(Top 7%)1013(Top 19%)
21M21.00 mi1.00 mi964+11917+8917+81190(Top 4%)1132(Top 7%)1132(Top 21%)
35K21.75 mi0.75 mi9649179171204(Top 5%)1147(Top 8%)1147(Top 22%)
23M23.00 mi1.25 mi960+4913+4913+41230(Top 5%)1161(Top 8%)1161(Top 22%)
24M24.00 mi1.00 mi955+5908+5908+51236(Top 5%)1170(Top 8%)1170(Top 22%)
40K24.85 mi0.85 mi961-6912-4912-41543(Top 6%)1453(Top 10%)1453(Top 27%)
25.2M25.20 mi0.35 mi960+1911+1911+11424(Top 5%)1341(Top 9%)1341(Top 25%)
Finish26.22 mi1.02 mi950+10902+9902+91257(Top 5%)1190(Top 8%)1190(Top 23%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1175

Males

1121

M18-39

1121

5K→10K

3.1 - 6.2 mi

Top 4%
×5stories
+79ft-138ft

Overall

1013

Males

963

M18-39

963

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1175

Males

1121

M18-39

1121

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

958

Males

910

M18-39

910

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1235

Males

1183

M18-39

1183

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

1018

Males

969

M18-39

969

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

942

Males

897

M18-39

897

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1058

Males

1013

M18-39

1013

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

1190

Males

1132

M18-39

1132

21M→35K

21.0 - 21.8 mi

Top 5%
×7stories
+17ft-86ft

Overall

1204

Males

1147

M18-39

1147

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1230

Males

1161

M18-39

1161

23M→24M

23.0 - 24.0 mi

Top 5%
×6stories
+12ft-82ft

Overall

1236

Males

1170

M18-39

1170

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1543

Males

1453

M18-39

1453

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1424

Males

1341

M18-39

1341

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1257

Males

1190

M18-39

1190

Passing Analysis

Category:
Athletes Passed
352
Passed By
238
Net Change
+114
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1064
5K → 10K7436+38#1064#1026
10K → 15K1757-40#1026#1066
15K → 20K4511+34#1066#1032
20K → Half29-7#1032#1039
Half → 25K3612+24#1039#1015
25K → 30K5519+36#1015#979
30K → 20M2016+4#979#975
20M → 21M2110+11#975#964
21M → 35K11110#964#964
35K → 23M139+4#964#960
23M → 24M1611+5#960#955
24M → 40K915-6#955#961
40K → 25.2M76+1#961#960
25.2M → Finish2616+10#960#950
TOTALS352238+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