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BOSTON MARATHON 2025

Lucas Debelder

Bib: 1317 M BE

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 4%
Gender (Male)
#0 / 16105
Top 6%
Division (M18-39)
#0 / 5642
Top 15%
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
5:59/mi
18:36
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
6:01/mi
37:18
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
6:03/mi
56:06
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
6:07/mi
1:15:07
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
6:03/mi
1:19:15
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
6:07/mi
1:34:04
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
6:20/mi
1:53:44
↑ 181↓ 1480.2%
138 ft elev
20M
6:24/mi
2:02:26
↑ 64↓ 500.2%
148 ft elev
21M
6:43/mi
2:09:09
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
6:10/mi
2:13:46
↑ 17↓ 861.7%
156 ft elev
23M
6:22/mi
2:21:44
↑ 23↓ 630.6%
116 ft elev
24M
6:13/mi
2:27:57
↓ 821.3%
34 ft elev
40K· 24.85 mi
6:24/mi
2:33:25
↓ 200.3%
20 ft elev
25.2M
6:58/mi
2:35:49
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
6:15/mi
2:42:11
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:19:156:03 /mi⚡ faster
2nd Half
1:22:566:20 /mi+4.6%
Positive split — 4.6% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
18:365:593.11 mi18:36
5:59
-
10K
37:186:003.10 mi18:42
6:01
+0:02
15K
56:066:013.11 mi18:48
6:03
+0:02
20K
1:15:076:033.11 mi19:01
6:07
+0:04
Half(13.11 mi)
1:19:156:030.68 mi4:08
6:03
-0:04
25K
1:34:046:032.42 mi14:49
6:07
+0:04
30K
1:53:446:063.11 mi19:40
6:20
+0:13
20M
2:02:266:071.36 mi8:42
6:24
+0:04
21M
2:09:096:091.00 mi6:43
6:43
+0:19
35K
2:13:466:090.75 mi4:37
6:10
-0:33
23M
2:21:446:101.25 mi7:58
6:22
+0:12
24M
2:27:576:101.00 mi6:13
6:13
-0:09
40K
2:33:256:100.85 mi5:28
6:24
+0:11
25.2M
2:35:496:110.35 mi2:24
6:58
+0:34
Finish(26.22 mi)
2:42:116:111.02 mi6:22
6:15
-0:43
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

5:59 /mi

Average Pace

6:11 /mi

Slowest Pace

6:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:33:04

94% of race

Time at Steady Pace

9:07

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:11 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi1041982982119011281128
10K3.10 mi1082-411020-381020-38115410921092
15K3.11 mi1106-241045-251045-25119011281128
20K3.11 mi1119-131059-141059-14124611811181
Half(13.11 mi)0.68 mi1121-21061-21061-2134512771277
25K2.42 mi1113+81052+91052+9112610621062
30K3.11 mi1127-141063-111063-11129512221222
20M1.36 mi1115+121051+121051+12124511761176
21M1.00 mi1098+171035+161035+16123811681168
35K0.75 mi1090+81027+81027+8112910641064
23M1.25 mi1046+44985+42985+421033976976
24M1.00 mi1038+8977+8977+81063999999
40K0.85 mi1024+14963+14963+14122911421142
25.2M0.35 mi1021+3960+3960+3132912161216
Finish(26.22 mi)1.02 mi1020+1958+2958+2166615421542

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21story building
+97ft-345ft

Overall

1190

Males

1128

M18-39

1128

5K→10K

3.1 - 6.2 mi

Top 4%
×5story building
+79ft-138ft

Overall

1154

Males

1092

M18-39

1092

10K→15K

6.2 - 9.3 mi

Top 4%
×3story building
+67ft-78ft

Overall

1190

Males

1128

M18-39

1128

15K→20K

9.3 - 12.4 mi

Top 4%
×5story building
+106ft-86ft

Overall

1246

Males

1181

M18-39

1181

20K→Half

12.4 - 13.1 mi

Top 5%
×2story building
+19ft-37ft

Overall

1345

Males

1277

M18-39

1277

Half→25K

13.1 - 15.5 mi

Top 4%
×4story building
+66ft-88ft

Overall

1126

Males

1062

M18-39

1062

25K→30K

15.5 - 18.6 mi

Top 5%
×9story building
+181ft-148ft

Overall

1295

Males

1222

M18-39

1222

30K→20M

18.6 - 20.0 mi

Top 4%
×5story building
+64ft-50ft

Overall

1245

Males

1176

M18-39

1176

20M→21M

20.0 - 21.0 mi

Top 4%
×8story building
+106ft-24ft

Overall

1238

Males

1168

M18-39

1168

21M→35K

21.0 - 21.8 mi

Top 4%
×7story building
+17ft-86ft

Overall

1129

Males

1064

M18-39

1064

35K→23M

21.8 - 23.0 mi

Top 4%
×5story building
+23ft-63ft

Overall

1033

Males

976

M18-39

976

23M→24M

23.0 - 24.0 mi

Top 4%
×6story building
+12ft-82ft

Overall

1063

Males

999

M18-39

999

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

1229

Males

1142

M18-39

1142

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1329

Males

1216

M18-39

1216

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2story building
+22ft-21ft

Overall

1666

Males

1542

M18-39

1542

Passing Analysis

Category:
Passed
386
Passed By
365
Net Change
+21
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1041
5K → 10K3273-41#1041#1082
10K → 15K2549-24#1082#1106
15K → 20K3144-13#1106#1119
20K → Half35-2#1119#1121
Half → 25K3830+8#1121#1113
25K → 30K4660-14#1113#1127
30K → 20M3624+12#1127#1115
20M → 21M3518+17#1115#1098
21M → 35K157+8#1098#1090
35K → 23M5612+44#1090#1046
23M → 24M1911+8#1046#1038
24M → 40K2612+14#1038#1024
40K → 25.2M96+3#1024#1021
25.2M → Finish1514+1#1021#1020
TOTALS386365+21

Passing Charts

Category:
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Passing Circle

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Position Flow

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Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing