Boston Marathon logo
BOSTON MARATHON 2025

Jonathan Cronin

Bib: 26764•M

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
34:34
Rank: #27685
Start → 5K
34:34 | 11:08/mi
10K· 6.21 mi
1:08:21
Rank: #27311 (+374)
5K → 10K
33:47 | 10:52/mi
15K· 9.32 mi
1:42:57
Rank: #27141 (+170)
10K → 15K
34:36 | 11:08/mi
20K· 12.43 mi
2:18:23
Rank: #26974 (+167)
15K → 20K
35:26 | 11:24/mi
Half· 13.11 mi
2:25:42
Rank: #26916 (+58)
20K → Half
7:19 | 10:43/mi
25K· 15.53 mi
2:54:02
Rank: #26780 (+136)
Half → 25K
28:20 | 11:41/mi
30K· 18.64 mi
3:39:11
Rank: #27073 (-293)
25K → 30K
45:09 | 14:32/mi
20M
3:58:01
Rank: #27090 (-17)
30K → 20M
18:50 | 13:52/mi
21M
4:11:47
Rank: #27060 (+30)
20M → 21M
13:46 | 13:46/mi
35K· 21.75 mi
4:22:49
Rank: #27114 (-54)
21M → 35K
11:02 | 14:45/mi
23M
4:40:16
Rank: #27141 (-27)
35K → 23M
17:27 | 13:56/mi
24M
4:53:27
Rank: #27150 (-9)
23M → 24M
13:11 | 13:11/mi
40K· 24.85 mi
5:04:44
Rank: #27133 (+17)
24M → 40K
11:17 | 13:11/mi
25.2M
5:09:55
Rank: #27144 (-11)
40K → 25.2M
5:11 | 15:02/mi
Finish· 26.22 mi
5:21:43
Rank: #27124 (+20)
25.2M → Finish
11:48 | 11:35/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
Time2:25:42
Pace11:07 /mi
2nd Half
Distance13.11 mi
Time2:56:01
Pace13:26 /mi
📊Positive Split: 20.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:5134:3411:0834:34
11:08
-
10K
6.21 mi12:24:381:08:2111:0033:47
10:52
-0:16
15K
9.32 mi12:59:141:42:5711:0334:36
11:08
+0:16
20K
12.43 mi13:34:402:18:2311:0835:26
11:24
+0:16
Half
13.11 mi13:41:592:25:4211:077:19
10:43
-0:41
25K
15.53 mi14:10:192:54:0211:1228:20
11:41
+0:58
30K
18.64 mi14:55:283:39:1111:4545:09
14:32
+2:51
20M
20.00 mi15:14:183:58:0111:5418:50
13:52
-0:40
21M
21.00 mi15:28:044:11:4711:5913:46
13:46
-0:06
35K
21.75 mi15:39:064:22:4912:0511:02
14:45
+0:59
23M
23.00 mi15:56:334:40:1612:1117:27
13:56
-0:49
24M
24.00 mi16:09:444:53:2712:1413:11
13:11
-0:45
40K
24.85 mi16:21:015:04:4412:1611:17
13:11
0:00
25.2M
25.20 mi16:26:125:09:5512:185:11
15:02
+1:51
Finish
26.22 mi16:38:005:21:4312:1711:48
11:35
-3:27

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

10:43 /mi

Average Pace

12:17 /mi

Slowest Pace

15:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:05:50

58% of race

Time at Steady Pace

57:04

18% of race

Time at Slower Pace

1:18:49

24% of race

Average Pace: 12:16 /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 mi11:50:5134:3411:0834:34
11:08
#27685
10K
6.21 mi12:24:381:08:2111:0033:47
10:52
#27311
15K
9.32 mi12:59:141:42:5711:0334:36
11:08
#27141
20K
12.43 mi13:34:402:18:2311:0835:26
11:24
#26974
Half
13.11 mi13:41:592:25:4211:077:19
10:43
#26916
25K
15.53 mi14:10:192:54:0211:1228:20
11:41
#26780
30K
18.64 mi14:55:283:39:1111:4545:09
14:32
#27073
20M
20.00 mi15:14:183:58:0111:5418:50
13:52
#27090
21M
21.00 mi15:28:044:11:4711:5913:46
13:46
#27060
35K
21.75 mi15:39:064:22:4912:0511:02
14:45
#27114
23M
23.00 mi15:56:334:40:1612:1117:27
13:56
#27141
24M
24.00 mi16:09:444:53:2712:1413:11
13:11
#27150
40K
24.85 mi16:21:015:04:4412:1611:17
13:11
#27133
25.2M
25.20 mi16:26:125:09:5512:185:11
15:02
#27144
Finish
26.22 mi16:38:005:21:4312:1711:48
11:35
#27124
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 mi27685158551585526852(Top 95%)15499(Top 96%)15499(Top 275%)
10K6.21 mi3.10 mi27311+37415706+14915706+14926884(Top 95%)15518(Top 96%)15518(Top 275%)
15K9.32 mi3.11 mi27141+17015636+7015636+7026852(Top 95%)15499(Top 96%)15499(Top 275%)
20K12.43 mi3.11 mi26974+16715554+8215554+8226523(Top 93%)15346(Top 95%)15346(Top 272%)
Half13.11 mi0.68 mi26916+5815525+2915525+2926149(Top 92%)15179(Top 94%)15179(Top 269%)
25K15.53 mi2.42 mi26780+13615463+6215463+6226088(Top 92%)15112(Top 94%)15112(Top 268%)
30K18.64 mi3.11 mi27073-29315568-10515568-10527813(Top 98%)15787(Top 98%)15787(Top 280%)
20M20.00 mi1.36 mi27090-1715564+415564+427183(Top 96%)15462(Top 96%)15462(Top 274%)
21M21.00 mi1.00 mi27060+3015544+2015544+2025964(Top 91%)14872(Top 92%)14872(Top 264%)
35K21.75 mi0.75 mi27114-5415559-1515559-1528009(Top 99%)15858(Top 98%)15858(Top 281%)
23M23.00 mi1.25 mi27141-2715563-415563-427269(Top 96%)15464(Top 96%)15464(Top 274%)
24M24.00 mi1.00 mi27150-915556+715556+727048(Top 95%)15323(Top 95%)15323(Top 272%)
40K24.85 mi0.85 mi27133+1715547+915547+926478(Top 93%)15038(Top 93%)15038(Top 267%)
25.2M25.20 mi0.35 mi27144-1115548-115548-127148(Top 96%)15353(Top 95%)15353(Top 272%)
Finish26.22 mi1.02 mi27124+2015538+1015538+1026267(Top 92%)14916(Top 93%)14916(Top 264%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 95%
×21stories
+97ft-345ft

Overall

26852

Males

15499

M18-39

15499

5K→10K

3.1 - 6.2 mi

Top 95%
×5stories
+79ft-138ft

Overall

26884

Males

15518

M18-39

15518

10K→15K

6.2 - 9.3 mi

Top 95%
×3stories
+67ft-78ft

Overall

26852

Males

15499

M18-39

15499

15K→20K

9.3 - 12.4 mi

Top 93%
×5stories
+106ft-86ft

Overall

26523

Males

15346

M18-39

15346

20K→Half

12.4 - 13.1 mi

Top 92%
×2stories
+19ft-37ft

Overall

26149

Males

15179

M18-39

15179

Half→25K

13.1 - 15.5 mi

Top 92%
×4stories
+66ft-88ft

Overall

26088

Males

15112

M18-39

15112

25K→30K

15.5 - 18.6 mi

Top 98%
×9stories
+181ft-148ft

Overall

27813

Males

15787

M18-39

15787

30K→20M

18.6 - 20.0 mi

Top 96%
×5stories
+64ft-50ft

Overall

27183

Males

15462

M18-39

15462

20M→21M

20.0 - 21.0 mi

Top 91%
×8stories
+106ft-24ft

Overall

25964

Males

14872

M18-39

14872

21M→35K

21.0 - 21.8 mi

Top 99%
×7stories
+17ft-86ft

Overall

28009

Males

15858

M18-39

15858

35K→23M

21.8 - 23.0 mi

Top 96%
×5stories
+23ft-63ft

Overall

27269

Males

15464

M18-39

15464

23M→24M

23.0 - 24.0 mi

Top 95%
×6stories
+12ft-82ft

Overall

27048

Males

15323

M18-39

15323

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

26478

Males

15038

M18-39

15038

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

27148

Males

15353

M18-39

15353

25.2M→Finish

25.2 - 26.2 mi

Top 92%
×2stories
+22ft-21ft

Overall

26267

Males

14916

M18-39

14916

Passing Analysis

Category:
Athletes Passed
1179
Passed By
618
Net Change
+561
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27685
5K → 10K3839+374#27685#27311
10K → 15K20131+170#27311#27141
15K → 20K20033+167#27141#26974
20K → Half602+58#26974#26916
Half → 25K15418+136#26916#26780
25K → 30K19312-293#26780#27073
30K → 20M2744-17#27073#27090
20M → 21M4616+30#27090#27060
21M → 35K458-54#27060#27114
35K → 23M2047-27#27114#27141
23M → 24M1524-9#27141#27150
24M → 40K225+17#27150#27133
40K → 25.2M415-11#27133#27144
25.2M → Finish244+20#27144#27124
TOTALS1179618+561
📊

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