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BOSTON MARATHON 2025

Christopher Sonderby

Bib: 13946•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 29%
Gender (Male)
#0 / 16105
Top 42%
Masters (Masters Men)
#0 / 10463
Top 30%
Division (M55-59)
#0 / 1648
Top 12%
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
7:20/mi
22:48
↑ 97↓ 3451.5%
10K· 6.21 mi
7:22/mi
45:40
↑ 79↓ 1380.4%
15K· 9.32 mi
7:23/mi
1:08:36
↑ 67↓ 78
20K· 12.43 mi
7:26/mi
1:31:41
↑ 106↓ 860.1%
Half· 13.11 mi
7:30/mi
1:36:48
↑ 19↓ 370.5%
25K· 15.53 mi
7:27/mi
1:54:53
↑ 66↓ 880.2%
30K· 18.64 mi
7:37/mi
2:18:33
↑ 181↓ 1480.2%
20M
7:31/mi
2:28:46
↑ 64↓ 500.2%
21M
7:48/mi
2:36:34
↑ 106↓ 241.6%
35K· 21.75 mi
7:13/mi
2:41:58
↑ 17↓ 861.7%
23M
7:15/mi
2:51:03
↑ 23↓ 630.6%
24M
7:16/mi
2:58:19
↓ 821.3%
40K· 24.85 mi
7:08/mi
3:04:25
↓ 200.3%
25.2M
7:41/mi
3:07:04
↑ 13↓ 160.2%
Finish· 26.22 mi
6:58/mi
3:14:10
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:36:48
Pace7:23 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:37:22
Pace7:26 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:2822:487:2022:48
7:20
-
10K
6.21 mi11:15:2045:407:2122:52
7:22
+0:02
15K
9.32 mi11:38:161:08:367:2222:56
7:23
+0:01
20K
12.43 mi12:01:211:31:417:2323:05
7:26
+0:03
Half
13.11 mi12:06:281:36:487:235:07
7:30
+0:04
25K
15.53 mi12:24:331:54:537:2418:05
7:27
-0:03
30K
18.64 mi12:48:132:18:337:2623:40
7:37
+0:10
20M
20.00 mi12:58:262:28:467:2610:13
7:31
-0:06
21M
21.00 mi13:06:142:36:347:277:48
7:48
+0:17
35K
21.75 mi13:11:382:41:587:275:24
7:13
-0:35
23M
23.00 mi13:20:432:51:037:269:05
7:15
+0:02
24M
24.00 mi13:27:592:58:197:267:16
7:16
+0:01
40K
24.85 mi13:34:053:04:257:256:06
7:08
-0:08
25.2M
25.20 mi13:36:443:07:047:252:39
7:41
+0:33
Finish
26.22 mi13:43:503:14:107:257:06
6:58
-0:43

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

6:58 /mi

Average Pace

7:25 /mi

Slowest Pace

7:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:03:43

95% of race

Time at Steady Pace

10:27

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:24 /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 mi10:52:2822:487:2022:48
7:20
#10739
10K
6.21 mi11:15:2045:407:2122:52
7:22
#10754
15K
9.32 mi11:38:161:08:367:2222:56
7:23
#10712
20K
12.43 mi12:01:211:31:417:2323:05
7:26
#10556
Half
13.11 mi12:06:281:36:487:235:07
7:30
#10602
25K
15.53 mi12:24:331:54:537:2418:05
7:27
#10408
30K
18.64 mi12:48:132:18:337:2623:40
7:37
#9985
20M
20.00 mi12:58:262:28:467:2610:13
7:31
#9696
21M
21.00 mi13:06:142:36:347:277:48
7:48
#9448
35K
21.75 mi13:11:382:41:587:275:24
7:13
#9308
23M
23.00 mi13:20:432:51:037:269:05
7:15
#8957
24M
24.00 mi13:27:592:58:197:267:16
7:16
#8784
40K
24.85 mi13:34:053:04:257:256:06
7:08
#8536
25.2M
25.20 mi13:36:443:07:047:252:39
7:41
#8420
Finish
26.22 mi13:43:503:14:107:257:06
6:58
#8278
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi107398555855510672(Top 38%)8432(Top 52%)8432(Top 512%)
10K6.21 mi3.10 mi10754-158541+148541+1410807(Top 38%)8564(Top 53%)8564(Top 520%)
15K9.32 mi3.11 mi10712+428495+468495+4610672(Top 38%)8432(Top 52%)8432(Top 512%)
20K12.43 mi3.11 mi10556+1568396+998396+9910135(Top 36%)8079(Top 50%)8079(Top 490%)
Half13.11 mi0.68 mi10602-468424-288424-2811602(Top 41%)8812(Top 55%)8812(Top 535%)
25K15.53 mi2.42 mi10408+1948290+1348290+1349587(Top 34%)7638(Top 47%)7638(Top 463%)
30K18.64 mi3.11 mi9985+4238009+2818009+2818566(Top 30%)6915(Top 43%)6915(Top 420%)
20M20.00 mi1.36 mi9696+2897813+1967813+1967133(Top 25%)5928(Top 37%)5928(Top 360%)
21M21.00 mi1.00 mi9448+2487645+1687645+1686194(Top 22%)5195(Top 32%)5195(Top 315%)
35K21.75 mi0.75 mi9308+1407548+977548+976724(Top 24%)5543(Top 34%)5543(Top 336%)
23M23.00 mi1.25 mi8957+3517307+2417307+2415220(Top 18%)4471(Top 28%)4471(Top 271%)
24M24.00 mi1.00 mi8784+1737177+1307177+1306224(Top 22%)5056(Top 31%)5056(Top 307%)
40K24.85 mi0.85 mi8536+2486997+1806997+1804693(Top 17%)3998(Top 25%)3998(Top 243%)
25.2M25.20 mi0.35 mi8420+1166912+856912+854300(Top 15%)3656(Top 23%)3656(Top 222%)
Finish26.22 mi1.02 mi8278+1426794+1186794+1185520(Top 19%)4444(Top 28%)4444(Top 270%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10672

Males

8432

M55-59

8432

5K→10K

3.1 - 6.2 mi

Top 38%
×5story building
+79ft-138ft

Overall

10807

Males

8564

M55-59

8564

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10672

Males

8432

M55-59

8432

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

10135

Males

8079

M55-59

8079

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

11602

Males

8812

M55-59

8812

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

9587

Males

7638

M55-59

7638

25K→30K

15.5 - 18.6 mi

Top 30%
×9story building
+181ft-148ft

Overall

8566

Males

6915

M55-59

6915

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

7133

Males

5928

M55-59

5928

20M→21M

20.0 - 21.0 mi

Top 22%
×8story building
+106ft-24ft

Overall

6194

Males

5195

M55-59

5195

21M→35K

21.0 - 21.8 mi

Top 24%
×7story building
+17ft-86ft

Overall

6724

Males

5543

M55-59

5543

35K→23M

21.8 - 23.0 mi

Top 18%
×5story building
+23ft-63ft

Overall

5220

Males

4471

M55-59

4471

23M→24M

23.0 - 24.0 mi

Top 22%
×6story building
+12ft-82ft

Overall

6224

Males

5056

M55-59

5056

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4693

Males

3998

M55-59

3998

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

4300

Males

3656

M55-59

3656

25.2M→Finish

25.2 - 26.2 mi

Top 19%
×2story building
+22ft-21ft

Overall

5520

Males

4444

M55-59

4444

Passing Analysis

Category:
Athletes Passed
3164*
Passed By
702
Net Change
+2461
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10739
5K → 10K242257-15#10739#10754
10K → 15K183141+42#10754#10712
15K → 20K24286+156#10712#10556
20K → Half1965-46#10556#10602
Half → 25K25662+194#10602#10408
25K → 30K463*40+423#10408#9985
30K → 20M30111+289#9985#9696
20M → 21M2524+248#9696#9448
21M → 35K1499+140#9448#9308
35K → 23M3521+351#9308#8957
23M → 24M18310+173#8957#8784
24M → 40K2513+248#8784#8536
40K → 25.2M1171+116#8536#8420
25.2M → Finish15412+142#8420#8278
TOTALS3164*702+2461

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

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