Boston Marathon logo
BOSTON MARATHON 2025

Deliang Song

Bib: 17397•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:50
Rank: #13706
Start → 5K
23:50 | 7:40/mi
10K· 6.21 mi
48:20
Rank: #14565 (-859)
5K → 10K
24:30 | 7:53/mi
15K· 9.32 mi
1:13:14
Rank: #15138 (-573)
10K → 15K
24:54 | 8:01/mi
20K· 12.43 mi
1:39:05
Rank: #15725 (-587)
15K → 20K
25:51 | 8:19/mi
Half· 13.11 mi
1:44:28
Rank: #15695 (+30)
20K → Half
5:23 | 7:53/mi
25K· 15.53 mi
2:04:41
Rank: #15767 (-72)
Half → 25K
20:13 | 8:20/mi
30K· 18.64 mi
2:32:23
Rank: #16039 (-272)
25K → 30K
27:42 | 8:55/mi
20M
2:44:36
Rank: #16079 (-40)
30K → 20M
12:13 | 8:59/mi
21M
2:54:10
Rank: #16040 (+39)
20M → 21M
9:34 | 9:34/mi
35K· 21.75 mi
3:00:35
Rank: #15997 (+43)
21M → 35K
6:25 | 8:35/mi
23M
3:12:30
Rank: #16139 (-142)
35K → 23M
11:55 | 9:31/mi
24M
3:22:02
Rank: #16318 (-179)
23M → 24M
9:32 | 9:32/mi
40K· 24.85 mi
3:29:46
Rank: #16338 (-20)
24M → 40K
7:44 | 9:03/mi
25.2M
3:33:24
Rank: #16396 (-58)
40K → 25.2M
3:38 | 10:32/mi
Finish· 26.22 mi
3:42:27
Rank: #16480 (-84)
25.2M → Finish
9:03 | 8:53/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
Time1:44:28
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:57:59
Pace9:00 /mi
📊Positive Split: 12.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:5523:507:4023:50
7:40
-
10K
6.21 mi11:38:2548:207:4724:30
7:53
+0:13
15K
9.32 mi12:03:191:13:147:5124:54
8:01
+0:08
20K
12.43 mi12:29:101:39:057:5825:51
8:19
+0:18
Half
13.11 mi12:34:331:44:287:585:23
7:53
-0:26
25K
15.53 mi12:54:462:04:418:0220:13
8:20
+0:27
30K
18.64 mi13:22:282:32:238:1027:42
8:55
+0:35
20M
20.00 mi13:34:412:44:368:1412:13
8:59
+0:04
21M
21.00 mi13:44:152:54:108:189:34
9:34
+0:35
35K
21.75 mi13:50:403:00:358:186:25
8:35
-0:59
23M
23.00 mi14:02:353:12:308:2211:55
9:31
+0:56
24M
24.00 mi14:12:073:22:028:259:32
9:32
+0:01
40K
24.85 mi14:19:513:29:468:267:44
9:03
-0:29
25.2M
25.20 mi14:23:293:33:248:283:38
10:32
+1:29
Finish
26.22 mi14:32:323:42:278:299:03
8:53
-1:39

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

7:40 /mi

Average Pace

8:29 /mi

Slowest Pace

10:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:41

56% of race

Time at Steady Pace

1:03:07

28% of race

Time at Slower Pace

34:39

16% of race

Average Pace: 8:29 /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 mi11:13:5523:507:4023:50
7:40
#13706
10K
6.21 mi11:38:2548:207:4724:30
7:53
#14565
15K
9.32 mi12:03:191:13:147:5124:54
8:01
#15138
20K
12.43 mi12:29:101:39:057:5825:51
8:19
#15725
Half
13.11 mi12:34:331:44:287:585:23
7:53
#15695
25K
15.53 mi12:54:462:04:418:0220:13
8:20
#15767
30K
18.64 mi13:22:282:32:238:1027:42
8:55
#16039
20M
20.00 mi13:34:412:44:368:1412:13
8:59
#16079
21M
21.00 mi13:44:152:54:108:189:34
9:34
#16040
35K
21.75 mi13:50:403:00:358:186:25
8:35
#15997
23M
23.00 mi14:02:353:12:308:2211:55
9:31
#16139
24M
24.00 mi14:12:073:22:028:259:32
9:32
#16318
40K
24.85 mi14:19:513:29:468:267:44
9:03
#16338
25.2M
25.20 mi14:23:293:33:248:283:38
10:32
#16396
Finish
26.22 mi14:32:323:42:278:299:03
8:53
#16480
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi137069958995816143(Top 57%)10870(Top 67%)10870(Top 660%)
10K6.21 mi3.10 mi14565-85910248-29010248-29015562(Top 55%)10653(Top 66%)10653(Top 646%)
15K9.32 mi3.11 mi15138-57310455-20710455-20716143(Top 57%)10870(Top 67%)10870(Top 660%)
20K12.43 mi3.11 mi15725-58710683-22810683-22817035(Top 60%)11193(Top 70%)11193(Top 679%)
Half13.11 mi0.68 mi15695+3010662+2110662+2114987(Top 53%)10349(Top 64%)10349(Top 628%)
25K15.53 mi2.42 mi15767-7210687-2510687-2516159(Top 57%)10712(Top 67%)10712(Top 650%)
30K18.64 mi3.11 mi16039-27210746-5910746-5917230(Top 61%)11032(Top 69%)11032(Top 669%)
20M20.00 mi1.36 mi16079-4010723+2310723+2316721(Top 59%)10691(Top 66%)10691(Top 649%)
21M21.00 mi1.00 mi16040+3910672+5110672+5116363(Top 58%)10413(Top 65%)10413(Top 632%)
35K21.75 mi0.75 mi15997+4310632+4010632+4015915(Top 56%)10142(Top 63%)10142(Top 615%)
23M23.00 mi1.25 mi16139-14210662-3010662-3018758(Top 66%)11328(Top 70%)11328(Top 687%)
24M24.00 mi1.00 mi16318-17910718-5610718-5619713(Top 69%)11723(Top 73%)11723(Top 711%)
40K24.85 mi0.85 mi16338-2010694+2410694+2416552(Top 58%)10173(Top 63%)10173(Top 617%)
25.2M25.20 mi0.35 mi16396-5810713-1910713-1919087(Top 67%)11345(Top 70%)11345(Top 688%)
Finish26.22 mi1.02 mi16480-8410718-510718-518429(Top 65%)11078(Top 69%)11078(Top 672%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21stories
+97ft-345ft

Overall

16143

Males

10870

M55-59

10870

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

15562

Males

10653

M55-59

10653

10K→15K

6.2 - 9.3 mi

Top 57%
×3stories
+67ft-78ft

Overall

16143

Males

10870

M55-59

10870

15K→20K

9.3 - 12.4 mi

Top 60%
×5stories
+106ft-86ft

Overall

17035

Males

11193

M55-59

11193

20K→Half

12.4 - 13.1 mi

Top 53%
×2stories
+19ft-37ft

Overall

14987

Males

10349

M55-59

10349

Half→25K

13.1 - 15.5 mi

Top 57%
×4stories
+66ft-88ft

Overall

16159

Males

10712

M55-59

10712

25K→30K

15.5 - 18.6 mi

Top 61%
×9stories
+181ft-148ft

Overall

17230

Males

11032

M55-59

11032

30K→20M

18.6 - 20.0 mi

Top 59%
×5stories
+64ft-50ft

Overall

16721

Males

10691

M55-59

10691

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

16363

Males

10413

M55-59

10413

21M→35K

21.0 - 21.8 mi

Top 56%
×7stories
+17ft-86ft

Overall

15915

Males

10142

M55-59

10142

35K→23M

21.8 - 23.0 mi

Top 66%
×5stories
+23ft-63ft

Overall

18758

Males

11328

M55-59

11328

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

19713

Males

11723

M55-59

11723

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16552

Males

10173

M55-59

10173

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

19087

Males

11345

M55-59

11345

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2stories
+22ft-21ft

Overall

18429

Males

11078

M55-59

11078

Passing Analysis

Category:
Athletes Passed
1131
Passed By
3905
Net Change
-2774
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13706
5K → 10K90949-859#13706#14565
10K → 15K70643-573#14565#15138
15K → 20K80667-587#15138#15725
20K → Half4111+30#15725#15695
Half → 25K159231-72#15695#15767
25K → 30K145417-272#15767#16039
30K → 20M103143-40#16039#16079
20M → 21M12182+39#16079#16040
21M → 35K8643+43#16040#15997
35K → 23M76218-142#15997#16139
23M → 24M34213-179#16139#16318
24M → 40K6080-20#16318#16338
40K → 25.2M1371-58#16338#16396
25.2M → Finish53137-84#16396#16480
TOTALS11313905-2774
📊

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