Boston Marathon logo
BOSTON MARATHON 2025

Kaci Serrour

Bib: 1986•M

QC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 5%
Gender (Male)
#0 / 16105
Top 9%
Masters (Masters Men)
#0 / 10463
Top 2%
Division (M40-44)
#0 / 2247
Top 7%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:41
Rank: #1126
Start → 5K
18:41 | 6:01/mi
10K· 6.21 mi
37:16
Rank: #1064 (+62)
5K → 10K
18:35 | 5:59/mi
15K· 9.32 mi
55:56
Rank: #1053 (+11)
10K → 15K
18:40 | 6:00/mi
20K· 12.43 mi
1:15:16
Rank: #1160 (-107)
15K → 20K
19:20 | 6:13/mi
Half· 13.11 mi
1:19:35
Rank: #1209 (-49)
20K → Half
4:19 | 6:20/mi
25K· 15.53 mi
1:35:12
Rank: #1386 (-177)
Half → 25K
15:37 | 6:26/mi
30K· 18.64 mi
1:55:41
Rank: #1510 (-124)
25K → 30K
20:29 | 6:36/mi
20M
2:04:49
Rank: #1560 (-50)
30K → 20M
9:08 | 6:43/mi
21M
2:11:47
Rank: #1565 (-5)
20M → 21M
6:58 | 6:58/mi
35K· 21.75 mi
2:16:38
Rank: #1575 (-10)
21M → 35K
4:51 | 6:29/mi
23M
2:25:05
Rank: #1574 (+1)
35K → 23M
8:27 | 6:45/mi
24M
2:31:31
Rank: #1555 (+19)
23M → 24M
6:26 | 6:26/mi
40K· 24.85 mi
2:37:18
Rank: #1578 (-23)
24M → 40K
5:47 | 6:46/mi
25.2M
2:39:49
Rank: #1575 (+3)
40K → 25.2M
2:31 | 7:18/mi
Finish· 26.22 mi
2:46:08
Rank: #1551 (+24)
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
Time1:19:35
Pace6:04 /mi
2nd Half
Distance13.11 mi
Time1:26:33
Pace6:36 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:5018:416:0118:41
6:01
-
10K
6.21 mi10:38:2537:166:0018:35
5:59
-0:02
15K
9.32 mi10:57:0555:566:0018:40
6:00
+0:01
20K
12.43 mi11:16:251:15:166:0319:20
6:13
+0:13
Half
13.11 mi11:20:441:19:356:044:19
6:20
+0:07
25K
15.53 mi11:36:211:35:126:0815:37
6:26
+0:06
30K
18.64 mi11:56:501:55:416:1220:29
6:36
+0:10
20M
20.00 mi12:05:582:04:496:149:08
6:43
+0:07
21M
21.00 mi12:12:562:11:476:176:58
6:58
+0:15
35K
21.75 mi12:17:472:16:386:174:51
6:29
-0:29
23M
23.00 mi12:26:142:25:056:188:27
6:45
+0:16
24M
24.00 mi12:32:402:31:316:196:26
6:26
-0:19
40K
24.85 mi12:38:272:37:186:205:47
6:46
+0:20
25.2M
25.20 mi12:40:582:39:496:212:31
7:18
+0:32
Finish
26.22 mi12:47:172:46:086:206:19
6:12
-1:06

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

5:59 /mi

Average Pace

6:20 /mi

Slowest Pace

7:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:21:35

49% of race

Time at Steady Pace

51:42

31% of race

Time at Slower Pace

32:51

20% of race

Average Pace: 6:20 /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 mi10:19:5018:416:0118:41
6:01
#1126
10K
6.21 mi10:38:2537:166:0018:35
5:59
#1064
15K
9.32 mi10:57:0555:566:0018:40
6:00
#1053
20K
12.43 mi11:16:251:15:166:0319:20
6:13
#1160
Half
13.11 mi11:20:441:19:356:044:19
6:20
#1209
25K
15.53 mi11:36:211:35:126:0815:37
6:26
#1386
30K
18.64 mi11:56:501:55:416:1220:29
6:36
#1510
20M
20.00 mi12:05:582:04:496:149:08
6:43
#1560
21M
21.00 mi12:12:562:11:476:176:58
6:58
#1565
35K
21.75 mi12:17:472:16:386:174:51
6:29
#1575
23M
23.00 mi12:26:142:25:056:188:27
6:45
#1574
24M
24.00 mi12:32:402:31:316:196:26
6:26
#1555
40K
24.85 mi12:38:272:37:186:205:47
6:46
#1578
25.2M
25.20 mi12:40:582:39:496:212:31
7:18
#1575
Finish
26.22 mi12:47:172:46:086:206:19
6:12
#1551
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi1126106710671064(Top 4%)1006(Top 6%)1006(Top 45%)
10K6.21 mi3.10 mi1064+621004+631004+631057(Top 4%)996(Top 6%)996(Top 44%)
15K9.32 mi3.11 mi1053+11993+11993+111064(Top 4%)1006(Top 6%)1006(Top 45%)
20K12.43 mi3.11 mi1160-1071100-1071100-1071666(Top 6%)1584(Top 10%)1584(Top 70%)
Half13.11 mi0.68 mi1209-491146-461146-462602(Top 9%)2485(Top 15%)2485(Top 111%)
25K15.53 mi2.42 mi1386-1771315-1691315-1692539(Top 9%)2414(Top 15%)2414(Top 107%)
30K18.64 mi3.11 mi1510-1241430-1151430-1152374(Top 8%)2249(Top 14%)2249(Top 100%)
20M20.00 mi1.36 mi1560-501479-491479-492530(Top 9%)2378(Top 15%)2378(Top 106%)
21M21.00 mi1.00 mi1565-51482-31482-32112(Top 7%)1977(Top 12%)1977(Top 88%)
35K21.75 mi0.75 mi1575-101491-91491-92351(Top 8%)2194(Top 14%)2194(Top 98%)
23M23.00 mi1.25 mi1574+11490+11490+12446(Top 9%)2265(Top 14%)2265(Top 101%)
24M24.00 mi1.00 mi1555+191471+191471+191780(Top 6%)1656(Top 10%)1656(Top 74%)
40K24.85 mi0.85 mi1578-231493-221493-222645(Top 9%)2402(Top 15%)2402(Top 107%)
25.2M25.20 mi0.35 mi1575+31490+31490+32438(Top 9%)2172(Top 13%)2172(Top 97%)
Finish26.22 mi1.02 mi1551+241468+221468+221507(Top 5%)1401(Top 9%)1401(Top 62%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1064

Males

1006

M40-44

1006

5K→10K

3.1 - 6.2 mi

Top 4%
×5stories
+79ft-138ft

Overall

1057

Males

996

M40-44

996

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1064

Males

1006

M40-44

1006

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1666

Males

1584

M40-44

1584

20K→Half

12.4 - 13.1 mi

Top 9%
×2stories
+19ft-37ft

Overall

2602

Males

2485

M40-44

2485

Half→25K

13.1 - 15.5 mi

Top 9%
×4stories
+66ft-88ft

Overall

2539

Males

2414

M40-44

2414

25K→30K

15.5 - 18.6 mi

Top 8%
×9stories
+181ft-148ft

Overall

2374

Males

2249

M40-44

2249

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2530

Males

2378

M40-44

2378

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

2112

Males

1977

M40-44

1977

21M→35K

21.0 - 21.8 mi

Top 8%
×7stories
+17ft-86ft

Overall

2351

Males

2194

M40-44

2194

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2446

Males

2265

M40-44

2265

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1780

Males

1656

M40-44

1656

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2645

Males

2402

M40-44

2402

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2438

Males

2172

M40-44

2172

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1507

Males

1401

M40-44

1401

Passing Analysis

Category:
Athletes Passed
405
Passed By
830
Net Change
-425
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1126
5K → 10K8725+62#1126#1064
10K → 15K4029+11#1064#1053
15K → 20K15122-107#1053#1160
20K → Half150-49#1160#1209
Half → 25K10187-177#1209#1386
25K → 30K25149-124#1386#1510
30K → 20M2272-50#1510#1560
20M → 21M3742-5#1560#1565
21M → 35K2131-10#1565#1575
35K → 23M4443+1#1575#1574
23M → 24M3516+19#1574#1555
24M → 40K2043-23#1555#1578
40K → 25.2M118+3#1578#1575
25.2M → Finish3713+24#1575#1551
TOTALS405830-425
📊

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