Boston Marathon logo
BOSTON MARATHON 2025

Christopher Tay

Bib: 29853•M

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
8:58/mi
27:53
↑ 97↓ 3451.5%
10K· 6.21 mi
8:31/mi
54:20
↑ 79↓ 1380.4%
15K· 9.32 mi
8:21/mi
1:20:16
↑ 67↓ 78
20K· 12.43 mi
8:19/mi
1:46:06
↑ 106↓ 860.1%
Half· 13.11 mi
8:07/mi
1:51:38
↑ 19↓ 370.5%
25K· 15.53 mi
8:19/mi
2:11:48
↑ 66↓ 880.2%
30K· 18.64 mi
8:49/mi
2:39:11
↑ 181↓ 1480.2%
20M
8:44/mi
2:51:03
↑ 64↓ 500.2%
21M
9:00/mi
3:00:03
↑ 106↓ 241.6%
35K· 21.75 mi
8:31/mi
3:06:25
↑ 17↓ 861.7%
23M
8:30/mi
3:17:03
↑ 23↓ 630.6%
24M
8:19/mi
3:25:22
↓ 821.3%
40K· 24.85 mi
8:53/mi
3:32:58
↓ 200.3%
25.2M
9:49/mi
3:36:21
↑ 13↓ 160.2%
Finish· 26.22 mi
8:27/mi
3:44:58
↑ 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
Time1:51:38
Pace8:31 /mi
2nd Half
Distance13.11 mi
Time1:53:20
Pace8:39 /mi
📊Positive Split: 1.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:1027:538:5827:53
8:58
-
10K
6.21 mi12:15:3754:208:4526:27
8:31
-0:27
15K
9.32 mi12:41:331:20:168:3725:56
8:21
-0:10
20K
12.43 mi13:07:231:46:068:3225:50
8:19
-0:02
Half
13.11 mi13:12:551:51:388:315:32
8:07
-0:12
25K
15.53 mi13:33:052:11:488:2920:10
8:19
+0:12
30K
18.64 mi14:00:282:39:118:3227:23
8:49
+0:30
20M
20.00 mi14:12:202:51:038:3311:52
8:44
-0:05
21M
21.00 mi14:21:203:00:038:349:00
9:00
+0:16
35K
21.75 mi14:27:423:06:258:346:22
8:31
-0:29
23M
23.00 mi14:38:203:17:038:3410:38
8:30
-0:01
24M
24.00 mi14:46:393:25:228:338:19
8:19
-0:11
40K
24.85 mi14:54:153:32:588:347:36
8:53
+0:34
25.2M
25.20 mi14:57:383:36:218:353:23
9:49
+0:56
Finish
26.22 mi15:06:153:44:588:358:37
8:27
-1:22

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

8:07 /mi

Average Pace

8:35 /mi

Slowest Pace

9:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

5:32

2% of race

Time at Steady Pace

2:12:19

59% of race

Time at Slower Pace

1:27:07

39% of race

Average Pace: 8:35 /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 mi11:49:1027:538:5827:53
8:58
#22309
10K
6.21 mi12:15:3754:208:4526:27
8:31
#21124
15K
9.32 mi12:41:331:20:168:3725:56
8:21
#20263
20K
12.43 mi13:07:231:46:068:3225:50
8:19
#19511
Half
13.11 mi13:12:551:51:388:315:32
8:07
#19354
25K
15.53 mi13:33:052:11:488:2920:10
8:19
#18821
30K
18.64 mi14:00:282:39:118:3227:23
8:49
#18377
20M
20.00 mi14:12:202:51:038:3311:52
8:44
#18112
21M
21.00 mi14:21:203:00:038:349:00
9:00
#17844
35K
21.75 mi14:27:423:06:258:346:22
8:31
#17738
23M
23.00 mi14:38:203:17:038:3410:38
8:30
#17454
24M
24.00 mi14:46:393:25:228:338:19
8:19
#17264
40K
24.85 mi14:54:153:32:588:347:36
8:53
#17195
25.2M
25.20 mi14:57:383:36:218:353:23
9:49
#17182
Finish
26.22 mi15:06:153:44:588:358:37
8:27
#17129
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi22309134441344418353(Top 65%)11777(Top 73%)11777(Top 209%)
10K6.21 mi3.10 mi21124+118512947+49712947+49719868(Top 70%)12415(Top 77%)12415(Top 220%)
15K9.32 mi3.11 mi20263+86112583+36412583+36418353(Top 65%)11777(Top 73%)11777(Top 209%)
20K12.43 mi3.11 mi19511+75212261+32212261+32217006(Top 60%)11181(Top 69%)11181(Top 198%)
Half13.11 mi0.68 mi19354+15712188+7312188+7316650(Top 59%)11045(Top 69%)11045(Top 196%)
25K15.53 mi2.42 mi18821+53311957+23111957+23116021(Top 56%)10656(Top 66%)10656(Top 189%)
30K18.64 mi3.11 mi18377+44411733+22411733+22416675(Top 59%)10787(Top 67%)10787(Top 191%)
20M20.00 mi1.36 mi18112+26511580+15311580+15315251(Top 54%)10037(Top 62%)10037(Top 178%)
21M21.00 mi1.00 mi17844+26811448+13211448+13213499(Top 48%)9113(Top 57%)9113(Top 162%)
35K21.75 mi0.75 mi17738+10611384+6411384+6415523(Top 55%)9954(Top 62%)9954(Top 176%)
23M23.00 mi1.25 mi17454+28411206+17811206+17813267(Top 47%)8825(Top 55%)8825(Top 156%)
24M24.00 mi1.00 mi17264+19011100+10611100+10613363(Top 47%)8840(Top 55%)8840(Top 157%)
40K24.85 mi0.85 mi17195+6911049+5111049+5115678(Top 55%)9757(Top 61%)9757(Top 173%)
25.2M25.20 mi0.35 mi17182+1311032+1711032+1716105(Top 57%)9930(Top 62%)9930(Top 176%)
Finish26.22 mi1.02 mi17129+5310994+3810994+3815925(Top 56%)9907(Top 62%)9907(Top 176%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

18353

Males

11777

M18-39

11777

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

19868

Males

12415

M18-39

12415

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

18353

Males

11777

M18-39

11777

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

17006

Males

11181

M18-39

11181

20K→Half

12.4 - 13.1 mi

Top 59%
×2story building
+19ft-37ft

Overall

16650

Males

11045

M18-39

11045

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

16021

Males

10656

M18-39

10656

25K→30K

15.5 - 18.6 mi

Top 59%
×9story building
+181ft-148ft

Overall

16675

Males

10787

M18-39

10787

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

15251

Males

10037

M18-39

10037

20M→21M

20.0 - 21.0 mi

Top 48%
×8story building
+106ft-24ft

Overall

13499

Males

9113

M18-39

9113

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

15523

Males

9954

M18-39

9954

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

13267

Males

8825

M18-39

8825

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

13363

Males

8840

M18-39

8840

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

15678

Males

9757

M18-39

9757

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16105

Males

9930

M18-39

9930

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2story building
+22ft-21ft

Overall

15925

Males

9907

M18-39

9907

Passing Analysis

Category:
Athletes Passed
5427
Passed By
247
Net Change
+5180
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22309
5K → 10K120520+1185#22309#21124
10K → 15K8676+861#21124#20263
15K → 20K7564+752#20263#19511
20K → Half1581+157#19511#19354
Half → 25K5363+533#19354#18821
25K → 30K49450+444#18821#18377
30K → 20M27813+265#18377#18112
20M → 21M2757+268#18112#17844
21M → 35K12519+106#17844#17738
35K → 23M29410+284#17738#17454
23M → 24M20313+190#17454#17264
24M → 40K10233+69#17264#17195
40K → 25.2M3825+13#17195#17182
25.2M → Finish9643+53#17182#17129
TOTALS5427247+5180
📊

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