Boston Marathon logo
BOSTON MARATHON 2024

Brendan Dempsey

Bib: 25401•M

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 25550
Gender (Male)
#0 / 14578
Division (M18-39)
#0 / 4849
Race Day Weather
55°/45°F
scattered 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
9:44/mi
30:14
↑ 97↓ 3451.5%
10K· 6.21 mi
9:52/mi
1:00:53
↑ 79↓ 1380.4%
15K· 9.32 mi
10:27/mi
1:33:21
↑ 67↓ 78
20K· 12.43 mi
11:16/mi
2:08:20
↑ 106↓ 860.1%
Half· 13.11 mi
11:33/mi
2:16:13
↑ 19↓ 370.5%
25K· 15.53 mi
12:19/mi
2:46:05
↑ 66↓ 880.2%
30K· 18.64 mi
12:30/mi
3:24:56
↑ 181↓ 1480.2%
20M
12:42/mi
3:42:12
↑ 64↓ 500.2%
21M
13:47/mi
3:55:59
↑ 106↓ 241.6%
35K· 21.75 mi
12:29/mi
4:05:19
↑ 17↓ 861.7%
23M
12:51/mi
4:21:24
↑ 23↓ 630.6%
24M
12:07/mi
4:33:31
↓ 821.3%
40K· 24.85 mi
12:04/mi
4:43:50
↓ 200.3%
25.2M
12:14/mi
4:48:03
↑ 13↓ 160.2%
Finish· 26.22 mi
10:04/mi
4:58:19
↑ 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 HalfFaster
Distance13.11 mi
Time2:16:13
Pace10:23 /mi
2nd Half
Distance13.11 mi
Time2:42:06
Pace12:22 /mi
📊Positive Split: 19.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:1230:149:4430:14
9:44
-
10K
6.21 mi12:18:511:00:539:4830:39
9:52
+0:08
15K
9.32 mi12:51:191:33:2110:0132:28
10:27
+0:35
20K
12.43 mi13:26:182:08:2010:2034:59
11:16
+0:49
Half
13.11 mi13:34:112:16:1310:237:53
11:33
+0:17
25K
15.53 mi14:04:032:46:0510:4129:52
12:19
+0:46
30K
18.64 mi14:42:543:24:5611:0038:51
12:30
+0:11
20M
20.00 mi15:00:103:42:1211:0717:16
12:42
+0:12
21M
21.00 mi15:13:573:55:5911:1413:47
13:47
+1:05
35K
21.75 mi15:23:174:05:1911:179:20
12:29
-1:18
23M
23.00 mi15:39:224:21:2411:2216:05
12:51
+0:22
24M
24.00 mi15:51:294:33:3111:2412:07
12:07
-0:44
40K
24.85 mi16:01:484:43:5011:2510:19
12:04
-0:03
25.2M
25.20 mi16:06:014:48:0311:264:13
12:14
+0:10
Finish
26.22 mi16:16:174:58:1911:2310:16
10:04
-2:10

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

9:44 /mi

Average Pace

11:23 /mi

Slowest Pace

13:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:18:36

46% of race

Time at Steady Pace

2:09:51

44% of race

Time at Slower Pace

29:52

10% of race

Average Pace: 11:23 /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 mi11:48:1230:149:4430:14
9:44
#22354
10K
6.21 mi12:18:511:00:539:4830:39
9:52
#22316
15K
9.32 mi12:51:191:33:2110:0132:28
10:27
#22511
20K
12.43 mi13:26:182:08:2010:2034:59
11:16
#22681
Half
13.11 mi13:34:112:16:1310:237:53
11:33
#22772
25K
15.53 mi14:04:032:46:0510:4129:52
12:19
#22982
30K
18.64 mi14:42:543:24:5611:0038:51
12:30
#22955
20M
20.00 mi15:00:103:42:1211:0717:16
12:42
#22936
21M
21.00 mi15:13:573:55:5911:1413:47
13:47
#22897
35K
21.75 mi15:23:174:05:1911:179:20
12:29
#22894
23M
23.00 mi15:39:224:21:2411:2216:05
12:51
#22885
24M
24.00 mi15:51:294:33:3111:2412:07
12:07
#22849
40K
24.85 mi16:01:484:43:5011:2510:19
12:04
#22798
25.2M
25.20 mi16:06:014:48:0311:264:13
12:14
#22733
Finish
26.22 mi16:16:174:58:1911:2310:16
10:04
#22641
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi22354132281322822834(Top 89%)13455(Top 92%)13455(Top 277%)
10K6.21 mi3.10 mi22316+3813203+2513203+2522262(Top 87%)13175(Top 90%)13175(Top 272%)
15K9.32 mi3.11 mi22511-19513314-11113314-11122834(Top 89%)13455(Top 92%)13455(Top 277%)
20K12.43 mi3.11 mi22681-17013389-7513389-7523069(Top 90%)13539(Top 93%)13539(Top 279%)
Half13.11 mi0.68 mi22772-9113435-4613435-4624155(Top 95%)13975(Top 96%)13975(Top 288%)
25K15.53 mi2.42 mi22982-21013492-5713492-5723539(Top 92%)13661(Top 94%)13661(Top 282%)
30K18.64 mi3.11 mi22955+2713438+5413438+5422689(Top 89%)13148(Top 90%)13148(Top 271%)
20M20.00 mi1.36 mi22936+1913410+2813410+2822470(Top 88%)12931(Top 89%)12931(Top 267%)
21M21.00 mi1.00 mi22897+3913364+4613364+4622019(Top 86%)12671(Top 87%)12671(Top 261%)
35K21.75 mi0.75 mi22894+313352+1213352+1222545(Top 88%)12898(Top 88%)12898(Top 266%)
23M23.00 mi1.25 mi22885+913337+1513337+1522292(Top 87%)12747(Top 87%)12747(Top 263%)
24M24.00 mi1.00 mi22849+3613308+2913308+2921666(Top 85%)12357(Top 85%)12357(Top 255%)
40K24.85 mi0.85 mi22798+5113278+3013278+3020584(Top 81%)11749(Top 81%)11749(Top 242%)
25.2M25.20 mi0.35 mi22733+6513244+3413244+3417874(Top 70%)10362(Top 71%)10362(Top 214%)
Finish26.22 mi1.02 mi22641+9213186+5813186+5818668(Top 73%)10823(Top 74%)10823(Top 223%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21story building
+97ft-345ft

Overall

22834

Males

13455

M18-39

13455

5K→10K

3.1 - 6.2 mi

Top 87%
×5story building
+79ft-138ft

Overall

22262

Males

13175

M18-39

13175

10K→15K

6.2 - 9.3 mi

Top 89%
×3story building
+67ft-78ft

Overall

22834

Males

13455

M18-39

13455

15K→20K

9.3 - 12.4 mi

Top 90%
×5story building
+106ft-86ft

Overall

23069

Males

13539

M18-39

13539

20K→Half

12.4 - 13.1 mi

Top 95%
×2story building
+19ft-37ft

Overall

24155

Males

13975

M18-39

13975

Half→25K

13.1 - 15.5 mi

Top 92%
×4story building
+66ft-88ft

Overall

23539

Males

13661

M18-39

13661

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

22689

Males

13148

M18-39

13148

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

22470

Males

12931

M18-39

12931

20M→21M

20.0 - 21.0 mi

Top 86%
×8story building
+106ft-24ft

Overall

22019

Males

12671

M18-39

12671

21M→35K

21.0 - 21.8 mi

Top 88%
×7story building
+17ft-86ft

Overall

22545

Males

12898

M18-39

12898

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

22292

Males

12747

M18-39

12747

23M→24M

23.0 - 24.0 mi

Top 85%
×6story building
+12ft-82ft

Overall

21666

Males

12357

M18-39

12357

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

20584

Males

11749

M18-39

11749

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

17874

Males

10362

M18-39

10362

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2story building
+22ft-21ft

Overall

18668

Males

10823

M18-39

10823

Passing Analysis

Category:
Athletes Passed
1218
Passed By
1505
Net Change
-287
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22354
5K → 10K223185+38#22354#22316
10K → 15K107302-195#22316#22511
15K → 20K115285-170#22511#22681
20K → Half15106-91#22681#22772
Half → 25K65275-210#22772#22982
25K → 30K164137+27#22982#22955
30K → 20M7758+19#22955#22936
20M → 21M7435+39#22936#22897
21M → 35K3229+3#22897#22894
35K → 23M5243+9#22894#22885
23M → 24M6024+36#22885#22849
24M → 40K7019+51#22849#22798
40K → 25.2M661+65#22798#22733
25.2M → Finish986+92#22733#22641
TOTALS12181505-287
📊

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