Boston Marathon logo
BOSTON MARATHON 2025

Callum Darby

Bib: 3868•M

ON

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 6%
Gender (Male)
#0 / 16105
Top 10%
Division (M18-39)
#0 / 5642
Top 24%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:49
Rank: #2959
Start → 5K
19:49 | 6:23/mi
10K· 6.21 mi
39:36
Rank: #2865 (+94)
5K → 10K
19:47 | 6:22/mi
15K· 9.32 mi
59:07
Rank: #2659 (+206)
10K → 15K
19:31 | 6:17/mi
20K· 12.43 mi
1:18:46
Rank: #2478 (+181)
15K → 20K
19:39 | 6:19/mi
Half· 13.11 mi
1:23:04
Rank: #2478
20K → Half
4:18 | 6:18/mi
25K· 15.53 mi
1:38:25
Rank: #2374 (+104)
Half → 25K
15:21 | 6:20/mi
30K· 18.64 mi
1:58:19
Rank: #2166 (+208)
25K → 30K
19:54 | 6:24/mi
20M
2:06:58
Rank: #2059 (+107)
30K → 20M
8:39 | 6:22/mi
21M
2:13:21
Rank: #1911 (+148)
20M → 21M
6:23 | 6:23/mi
35K· 21.75 mi
2:18:03
Rank: #1867 (+44)
21M → 35K
4:42 | 6:17/mi
23M
2:26:06
Rank: #1779 (+88)
35K → 23M
8:03 | 6:26/mi
24M
2:32:27
Rank: #1743 (+36)
23M → 24M
6:21 | 6:21/mi
40K· 24.85 mi
2:37:58
Rank: #1706 (+37)
24M → 40K
5:31 | 6:27/mi
25.2M
2:40:24
Rank: #1695 (+11)
40K → 25.2M
2:26 | 7:03/mi
Finish· 26.22 mi
2:46:56
Rank: #1704 (-9)
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 Half⚖️ Balanced
Distance13.11 mi
Time1:23:04
Pace6:20 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:23:52
Pace6:24 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:1119:496:2319:49
6:23
-
10K
6.21 mi10:41:5839:366:2219:47
6:22
-0:01
15K
9.32 mi11:01:2959:076:2119:31
6:17
-0:05
20K
12.43 mi11:21:081:18:466:2019:39
6:19
+0:02
Half
13.11 mi11:25:261:23:046:204:18
6:18
-0:01
25K
15.53 mi11:40:471:38:256:2015:21
6:20
+0:02
30K
18.64 mi12:00:411:58:196:2119:54
6:24
+0:04
20M
20.00 mi12:09:202:06:586:218:39
6:22
-0:02
21M
21.00 mi12:15:432:13:216:216:23
6:23
+0:01
35K
21.75 mi12:20:252:18:036:214:42
6:17
-0:06
23M
23.00 mi12:28:282:26:066:218:03
6:26
+0:09
24M
24.00 mi12:34:492:32:276:216:21
6:21
-0:05
40K
24.85 mi12:40:202:37:586:215:31
6:27
+0:06
25.2M
25.20 mi12:42:462:40:246:222:26
7:03
+0:36
Finish
26.22 mi12:49:182:46:566:226:32
6:25
-0:38

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

6:17 /mi

Average Pace

6:22 /mi

Slowest Pace

7:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:44:30

99% of race

Time at Steady Pace

2:26

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:22 /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 mi10:22:1119:496:2319:49
6:23
#2959
10K
6.21 mi10:41:5839:366:2219:47
6:22
#2865
15K
9.32 mi11:01:2959:076:2119:31
6:17
#2659
20K
12.43 mi11:21:081:18:466:2019:39
6:19
#2478
Half
13.11 mi11:25:261:23:046:204:18
6:18
#2478
25K
15.53 mi11:40:471:38:256:2015:21
6:20
#2374
30K
18.64 mi12:00:411:58:196:2119:54
6:24
#2166
20M
20.00 mi12:09:202:06:586:218:39
6:22
#2059
21M
21.00 mi12:15:432:13:216:216:23
6:23
#1911
35K
21.75 mi12:20:252:18:036:214:42
6:17
#1867
23M
23.00 mi12:28:282:26:066:218:03
6:26
#1779
24M
24.00 mi12:34:492:32:276:216:21
6:21
#1743
40K
24.85 mi12:40:202:37:586:215:31
6:27
#1706
25.2M
25.20 mi12:42:462:40:246:222:26
7:03
#1695
Finish
26.22 mi12:49:182:46:566:226:32
6:25
#1704
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2959281528152262(Top 8%)2157(Top 13%)2157(Top 38%)
10K6.21 mi3.10 mi2865+942729+862729+862844(Top 10%)2707(Top 17%)2707(Top 48%)
15K9.32 mi3.11 mi2659+2062535+1942535+1942262(Top 8%)2157(Top 13%)2157(Top 38%)
20K12.43 mi3.11 mi2478+1812365+1702365+1702125(Top 7%)2026(Top 13%)2026(Top 36%)
Half13.11 mi0.68 mi2478236523652546(Top 9%)2435(Top 15%)2435(Top 43%)
25K15.53 mi2.42 mi2374+1042265+1002265+1002029(Top 7%)1933(Top 12%)1933(Top 34%)
30K18.64 mi3.11 mi2166+2082063+2022063+2021588(Top 6%)1505(Top 9%)1505(Top 27%)
20M20.00 mi1.36 mi2059+1071962+1011962+1011147(Top 4%)1083(Top 7%)1083(Top 19%)
21M21.00 mi1.00 mi1911+1481818+1441818+144506(Top 2%)477(Top 3%)477(Top 8%)
35K21.75 mi0.75 mi1867+441775+431775+431551(Top 5%)1461(Top 9%)1461(Top 26%)
23M23.00 mi1.25 mi1779+881687+881687+881250(Top 4%)1179(Top 7%)1179(Top 21%)
24M24.00 mi1.00 mi1743+361651+361651+361496(Top 5%)1400(Top 9%)1400(Top 25%)
40K24.85 mi0.85 mi1706+371615+361615+361457(Top 5%)1351(Top 8%)1351(Top 24%)
25.2M25.20 mi0.35 mi1695+111606+91606+91679(Top 6%)1536(Top 10%)1536(Top 27%)
Finish26.22 mi1.02 mi1704-91613-71613-72368(Top 8%)2160(Top 13%)2160(Top 38%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21stories
+97ft-345ft

Overall

2262

Males

2157

M18-39

2157

5K→10K

3.1 - 6.2 mi

Top 10%
×5stories
+79ft-138ft

Overall

2844

Males

2707

M18-39

2707

10K→15K

6.2 - 9.3 mi

Top 8%
×3stories
+67ft-78ft

Overall

2262

Males

2157

M18-39

2157

15K→20K

9.3 - 12.4 mi

Top 7%
×5stories
+106ft-86ft

Overall

2125

Males

2026

M18-39

2026

20K→Half

12.4 - 13.1 mi

Top 9%
×2stories
+19ft-37ft

Overall

2546

Males

2435

M18-39

2435

Half→25K

13.1 - 15.5 mi

Top 7%
×4stories
+66ft-88ft

Overall

2029

Males

1933

M18-39

1933

25K→30K

15.5 - 18.6 mi

Top 6%
×9stories
+181ft-148ft

Overall

1588

Males

1505

M18-39

1505

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1147

Males

1083

M18-39

1083

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

506

Males

477

M18-39

477

21M→35K

21.0 - 21.8 mi

Top 5%
×7stories
+17ft-86ft

Overall

1551

Males

1461

M18-39

1461

35K→23M

21.8 - 23.0 mi

Top 4%
×5stories
+23ft-63ft

Overall

1250

Males

1179

M18-39

1179

23M→24M

23.0 - 24.0 mi

Top 5%
×6stories
+12ft-82ft

Overall

1496

Males

1400

M18-39

1400

24M→40K

24.0 - 24.9 mi

Top 5%
×1story
+6ft-20ft

Overall

1457

Males

1351

M18-39

1351

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1679

Males

1536

M18-39

1536

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2stories
+22ft-21ft

Overall

2368

Males

2160

M18-39

2160

Passing Analysis

Category:
Athletes Passed
1474
Passed By
219
Net Change
+1255
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2959
5K → 10K18187+94#2959#2865
10K → 15K2159+206#2865#2659
15K → 20K1898+181#2659#2478
20K → Half18180#2478#2478
Half → 25K11713+104#2478#2374
25K → 30K2179+208#2374#2166
30K → 20M1092+107#2166#2059
20M → 21M1480+148#2059#1911
21M → 35K473+44#1911#1867
35K → 23M913+88#1867#1779
23M → 24M5115+36#1779#1743
24M → 40K4912+37#1743#1706
40K → 25.2M2110+11#1706#1695
25.2M → Finish2130-9#1695#1704
TOTALS1474219+1255
📊

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