Boston Marathon logo
BOSTON MARATHON 2025

Derek Dinderman

Bib: 3877•M

IA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 5%
Gender (Male)
#0 / 16105
Top 8%
Division (M18-39)
#0 / 5642
Top 19%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:36
Rank: #2479
Start → 5K
19:36 | 6:19/mi
10K· 6.21 mi
39:07
Rank: #2371 (+108)
5K → 10K
19:31 | 6:17/mi
15K· 9.32 mi
58:33
Rank: #2260 (+111)
10K → 15K
19:26 | 6:15/mi
20K· 12.43 mi
1:18:03
Rank: #2148 (+112)
15K → 20K
19:30 | 6:17/mi
Half· 13.11 mi
1:22:14
Rank: #2126 (+22)
20K → Half
4:11 | 6:08/mi
25K· 15.53 mi
1:37:24
Rank: #2034 (+92)
Half → 25K
15:10 | 6:15/mi
30K· 18.64 mi
1:57:11
Rank: #1878 (+156)
25K → 30K
19:47 | 6:22/mi
20M
2:05:47
Rank: #1781 (+97)
30K → 20M
8:36 | 6:20/mi
21M
2:12:19
Rank: #1676 (+105)
20M → 21M
6:32 | 6:32/mi
35K· 21.75 mi
2:16:52
Rank: #1625 (+51)
21M → 35K
4:33 | 6:05/mi
23M
2:24:45
Rank: #1523 (+102)
35K → 23M
7:53 | 6:18/mi
24M
2:30:53
Rank: #1451 (+72)
23M → 24M
6:08 | 6:08/mi
40K· 24.85 mi
2:36:12
Rank: #1404 (+47)
24M → 40K
5:19 | 6:13/mi
25.2M
2:38:33
Rank: #1383 (+21)
40K → 25.2M
2:21 | 6:49/mi
Finish· 26.22 mi
2:44:25
Rank: #1310 (+73)
25.2M → Finish
5:52 | 5:45/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 Half⚖️ Balanced
Distance13.11 mi
Time1:22:14
Pace6:16 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:22:11
Pace6:16 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:0119:366:1919:36
6:19
-
10K
6.21 mi10:41:3239:076:1819:31
6:17
-0:02
15K
9.32 mi11:00:5858:336:1719:26
6:15
-0:02
20K
12.43 mi11:20:281:18:036:1719:30
6:17
+0:02
Half
13.11 mi11:24:391:22:146:164:11
6:08
-0:09
25K
15.53 mi11:39:491:37:246:1615:10
6:15
+0:07
30K
18.64 mi11:59:361:57:116:1719:47
6:22
+0:07
20M
20.00 mi12:08:122:05:476:178:36
6:20
-0:02
21M
21.00 mi12:14:442:12:196:186:32
6:32
+0:12
35K
21.75 mi12:19:172:16:526:184:33
6:05
-0:27
23M
23.00 mi12:27:102:24:456:187:53
6:18
+0:13
24M
24.00 mi12:33:182:30:536:176:08
6:08
-0:10
40K
24.85 mi12:38:372:36:126:175:19
6:13
+0:05
25.2M
25.20 mi12:40:582:38:336:182:21
6:49
+0:36
Finish
26.22 mi12:46:502:44:256:175:52
5:45
-1:04

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

5:45 /mi

Average Pace

6:17 /mi

Slowest Pace

6:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:09

77% of race

Time at Steady Pace

34:55

21% of race

Time at Slower Pace

2:21

1% of race

Average Pace: 6:16 /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 mi10:22:0119:366:1919:36
6:19
#2479
10K
6.21 mi10:41:3239:076:1819:31
6:17
#2371
15K
9.32 mi11:00:5858:336:1719:26
6:15
#2260
20K
12.43 mi11:20:281:18:036:1719:30
6:17
#2148
Half
13.11 mi11:24:391:22:146:164:11
6:08
#2126
25K
15.53 mi11:39:491:37:246:1615:10
6:15
#2034
30K
18.64 mi11:59:361:57:116:1719:47
6:22
#1878
20M
20.00 mi12:08:122:05:476:178:36
6:20
#1781
21M
21.00 mi12:14:442:12:196:186:32
6:32
#1676
35K
21.75 mi12:19:172:16:526:184:33
6:05
#1625
23M
23.00 mi12:27:102:24:456:187:53
6:18
#1523
24M
24.00 mi12:33:182:30:536:176:08
6:08
#1451
40K
24.85 mi12:38:372:36:126:175:19
6:13
#1404
25.2M
25.20 mi12:40:582:38:336:182:21
6:49
#1383
Finish
26.22 mi12:46:502:44:256:175:52
5:45
#1310
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2479236123612109(Top 7%)2011(Top 12%)2011(Top 36%)
10K6.21 mi3.10 mi2371+1082261+1002261+1002290(Top 8%)2191(Top 14%)2191(Top 39%)
15K9.32 mi3.11 mi2260+1112157+1042157+1042109(Top 7%)2011(Top 12%)2011(Top 36%)
20K12.43 mi3.11 mi2148+1122050+1072050+1071910(Top 7%)1820(Top 11%)1820(Top 32%)
Half13.11 mi0.68 mi2126+222030+202030+201638(Top 6%)1557(Top 10%)1557(Top 28%)
25K15.53 mi2.42 mi2034+921939+911939+911659(Top 6%)1576(Top 10%)1576(Top 28%)
30K18.64 mi3.11 mi1878+1561789+1501789+1501425(Top 5%)1346(Top 8%)1346(Top 24%)
20M20.00 mi1.36 mi1781+971693+961693+961040(Top 4%)982(Top 6%)982(Top 17%)
21M21.00 mi1.00 mi1676+1051590+1031590+103768(Top 3%)727(Top 5%)727(Top 13%)
35K21.75 mi0.75 mi1625+511540+501540+50921(Top 3%)866(Top 5%)866(Top 15%)
23M23.00 mi1.25 mi1523+1021442+981442+98878(Top 3%)829(Top 5%)829(Top 15%)
24M24.00 mi1.00 mi1451+721371+711371+71857(Top 3%)806(Top 5%)806(Top 14%)
40K24.85 mi0.85 mi1404+471325+461325+46766(Top 3%)717(Top 4%)717(Top 13%)
25.2M25.20 mi0.35 mi1383+211304+211304+211012(Top 4%)930(Top 6%)930(Top 16%)
Finish26.22 mi1.02 mi1310+731232+721232+72447(Top 2%)420(Top 3%)420(Top 7%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 7%
×21stories
+97ft-345ft

Overall

2109

Males

2011

M18-39

2011

5K→10K

3.1 - 6.2 mi

Top 8%
×5stories
+79ft-138ft

Overall

2290

Males

2191

M18-39

2191

10K→15K

6.2 - 9.3 mi

Top 7%
×3stories
+67ft-78ft

Overall

2109

Males

2011

M18-39

2011

15K→20K

9.3 - 12.4 mi

Top 7%
×5stories
+106ft-86ft

Overall

1910

Males

1820

M18-39

1820

20K→Half

12.4 - 13.1 mi

Top 6%
×2stories
+19ft-37ft

Overall

1638

Males

1557

M18-39

1557

Half→25K

13.1 - 15.5 mi

Top 6%
×4stories
+66ft-88ft

Overall

1659

Males

1576

M18-39

1576

25K→30K

15.5 - 18.6 mi

Top 5%
×9stories
+181ft-148ft

Overall

1425

Males

1346

M18-39

1346

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1040

Males

982

M18-39

982

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

768

Males

727

M18-39

727

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

921

Males

866

M18-39

866

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

878

Males

829

M18-39

829

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

857

Males

806

M18-39

806

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

766

Males

717

M18-39

717

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1012

Males

930

M18-39

930

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

447

Males

420

M18-39

420

Passing Analysis

Category:
Athletes Passed
1311
Passed By
142
Net Change
+1169
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2479
5K → 10K16052+108#2479#2371
10K → 15K14130+111#2371#2260
15K → 20K13119+112#2260#2148
20K → Half264+22#2148#2126
Half → 25K10210+92#2126#2034
25K → 30K16812+156#2034#1878
30K → 20M1014+97#1878#1781
20M → 21M1072+105#1781#1676
21M → 35K510+51#1676#1625
35K → 23M1053+102#1625#1523
23M → 24M720+72#1523#1451
24M → 40K492+47#1451#1404
40K → 25.2M232+21#1404#1383
25.2M → Finish752+73#1383#1310
TOTALS1311142+1169
📊

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