Boston Marathon logo
BOSTON MARATHON 2025

Brendan Sullivan

Bib: 32561•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

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:56/mi
27:45
↑ 97↓ 3451.5%
10K· 6.21 mi
9:22/mi
56:52
↑ 79↓ 1380.4%
15K· 9.32 mi
8:43/mi
1:23:56
↑ 67↓ 78
20K· 12.43 mi
8:40/mi
1:50:51
↑ 106↓ 860.1%
Half· 13.11 mi
8:14/mi
1:56:28
↑ 19↓ 370.5%
25K· 15.53 mi
9:09/mi
2:18:39
↑ 66↓ 880.2%
30K· 18.64 mi
8:45/mi
2:45:50
↑ 181↓ 1480.2%
20M
8:42/mi
2:57:40
↑ 64↓ 500.2%
21M
8:53/mi
3:06:33
↑ 106↓ 241.6%
35K· 21.75 mi
8:24/mi
3:12:50
↑ 17↓ 861.7%
23M
8:31/mi
3:23:30
↑ 23↓ 630.6%
24M
8:29/mi
3:31:59
↓ 821.3%
40K· 24.85 mi
8:09/mi
3:38:57
↓ 200.3%
25.2M
8:30/mi
3:41:53
↑ 13↓ 160.2%
Finish· 26.22 mi
7:25/mi
3:49:26
↑ 22↓ 21

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
Distance13.11 mi
Time1:56:28
Pace8:53 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:52:58
Pace8:37 /mi
📊Negative Split: 3.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:3127:458:5627:45
8:56
-
10K
6.21 mi12:22:3856:529:0929:07
9:22
+0:26
15K
9.32 mi12:49:421:23:569:0027:04
8:43
-0:39
20K
12.43 mi13:16:371:50:518:5526:55
8:40
-0:03
Half
13.11 mi13:22:141:56:288:535:37
8:14
-0:26
25K
15.53 mi13:44:252:18:398:5622:11
9:09
+0:55
30K
18.64 mi14:11:362:45:508:5427:11
8:45
-0:24
20M
20.00 mi14:23:262:57:408:5311:50
8:42
-0:03
21M
21.00 mi14:32:193:06:338:538:53
8:53
+0:11
35K
21.75 mi14:38:363:12:508:526:17
8:24
-0:29
23M
23.00 mi14:49:163:23:308:5110:40
8:31
+0:07
24M
24.00 mi14:57:453:31:598:508:29
8:29
-0:02
40K
24.85 mi15:04:433:38:578:496:58
8:09
-0:20
25.2M
25.20 mi15:07:393:41:538:482:56
8:30
+0:21
Finish
26.22 mi15:15:123:49:268:457:33
7:25
-1:05

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

7:25 /mi

Average Pace

8:45 /mi

Slowest Pace

9:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

26:25

12% of race

Time at Steady Pace

2:03:58

54% of race

Time at Slower Pace

1:19:03

34% of race

Average Pace: 8:45 /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 mi11:53:3127:458:5627:45
8:56
#22130
10K
6.21 mi12:22:3856:529:0929:07
9:22
#23023
15K
9.32 mi12:49:421:23:569:0027:04
8:43
#22297
20K
12.43 mi13:16:371:50:518:5526:55
8:40
#21553
Half
13.11 mi13:22:141:56:288:535:37
8:14
#21351
25K
15.53 mi13:44:252:18:398:5622:11
9:09
#21229
30K
18.64 mi14:11:362:45:508:5427:11
8:45
#20354
20M
20.00 mi14:23:262:57:408:5311:50
8:42
#20001
21M
21.00 mi14:32:193:06:338:538:53
8:53
#19621
35K
21.75 mi14:38:363:12:508:526:17
8:24
#19450
23M
23.00 mi14:49:163:23:308:5110:40
8:31
#19136
24M
24.00 mi14:57:453:31:598:508:29
8:29
#18947
40K
24.85 mi15:04:433:38:578:496:58
8:09
#18672
25.2M
25.20 mi15:07:393:41:538:482:56
8:30
#18510
Finish
26.22 mi15:15:123:49:268:457:33
7:25
#18189
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi22130133671336720547(Top 72%)12749(Top 79%)12749(Top 226%)
10K6.21 mi3.10 mi23023-89313796-42913796-42923749(Top 84%)14144(Top 88%)14144(Top 251%)
15K9.32 mi3.11 mi22297+72613483+31313483+31320547(Top 72%)12749(Top 79%)12749(Top 226%)
20K12.43 mi3.11 mi21553+74413148+33513148+33519208(Top 68%)12125(Top 75%)12125(Top 215%)
Half13.11 mi0.68 mi21351+20213058+9013058+9017453(Top 61%)11392(Top 71%)11392(Top 202%)
25K15.53 mi2.42 mi21229+12213000+5813000+5820553(Top 72%)12653(Top 79%)12653(Top 224%)
30K18.64 mi3.11 mi20354+87512566+43412566+43416288(Top 57%)10621(Top 66%)10621(Top 188%)
20M20.00 mi1.36 mi20001+35312403+16312403+16315115(Top 53%)9979(Top 62%)9979(Top 177%)
21M21.00 mi1.00 mi19621+38012207+19612207+19612829(Top 45%)8770(Top 54%)8770(Top 155%)
35K21.75 mi0.75 mi19450+17112121+8612121+8614850(Top 52%)9667(Top 60%)9667(Top 171%)
23M23.00 mi1.25 mi19136+31411959+16211959+16213427(Top 47%)8912(Top 55%)8912(Top 158%)
24M24.00 mi1.00 mi18947+18911850+10911850+10914390(Top 51%)9334(Top 58%)9334(Top 165%)
40K24.85 mi0.85 mi18672+27511705+14511705+14511216(Top 39%)7686(Top 48%)7686(Top 136%)
25.2M25.20 mi0.35 mi18510+16211620+8511620+858828(Top 31%)6387(Top 40%)6387(Top 113%)
Finish26.22 mi1.02 mi18189+32111465+15511465+1558554(Top 30%)6226(Top 39%)6226(Top 110%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

20547

Males

12749

M18-39

12749

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

23749

Males

14144

M18-39

14144

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

20547

Males

12749

M18-39

12749

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

19208

Males

12125

M18-39

12125

20K→Half

12.4 - 13.1 mi

Top 61%
×2story building
+19ft-37ft

Overall

17453

Males

11392

M18-39

11392

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

20553

Males

12653

M18-39

12653

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

16288

Males

10621

M18-39

10621

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

15115

Males

9979

M18-39

9979

20M→21M

20.0 - 21.0 mi

Top 45%
×8story building
+106ft-24ft

Overall

12829

Males

8770

M18-39

8770

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

14850

Males

9667

M18-39

9667

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

13427

Males

8912

M18-39

8912

23M→24M

23.0 - 24.0 mi

Top 51%
×6story building
+12ft-82ft

Overall

14390

Males

9334

M18-39

9334

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

11216

Males

7686

M18-39

7686

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8828

Males

6387

M18-39

6387

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2story building
+22ft-21ft

Overall

8554

Males

6226

M18-39

6226

Passing Analysis

Category:
Athletes Passed
4981
Passed By
1040
Net Change
+3941
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22130
5K → 10K42935-893#22130#23023
10K → 15K7282+726#23023#22297
15K → 20K7517+744#22297#21553
20K → Half2020+202#21553#21351
Half → 25K20482+122#21351#21229
25K → 30K8750+875#21229#20354
30K → 20M3541+353#20354#20001
20M → 21M3811+380#20001#19621
21M → 35K1710+171#19621#19450
35K → 23M3140+314#19450#19136
23M → 24M1978+189#19136#18947
24M → 40K2761+275#18947#18672
40K → 25.2M1620+162#18672#18510
25.2M → Finish3243+321#18510#18189
TOTALS49811040+3941
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing